Mobile phone cases with integrated storage face distinct engineering challenges around card security and accessibility. Current designs must maintain a thickness under 12mm while protecting cards from electromagnetic interference, preventing accidental ejection, and allowing quick access—all without compromising the phone's wireless charging capabilities or signal strength.

The fundamental challenge lies in balancing secure card retention with ease of access while maintaining the slim profile expected of modern phone cases.

This page brings together solutions from recent research—including spring-loaded retention mechanisms, removable storage modules, biometric security systems, and ejector mechanisms for card accessibility. These and other approaches focus on practical implementations that maintain protection while enabling convenient everyday use.

1. Magnetic Card Storage Case with Front Slot and Pressurized Securing Ports

AN BO GEUN, 2024

Card storage case for mobile phones that attaches to the back of the phone and has a front slot for inserting cards. The case has magnets to attach to the phone, a front slot for card storage, and side and front pressurized ports to secure the cards in place. This prevents cards from falling out when the case is removed or moved. The case also has features like a locking catch to prevent cards from sliding out. The magnetic attachment allows easy removal of the case with cards when needed.

2. Phone Case with Detachable Card Holder Sleeve and Integrated Strap and Keychain Connectors

DONGGUAN ZHONGSHENG PHOTOELECTRIC IND CO LTD, DONGGUAN ZHONGSHENG PHOTOELECTRIC INDUSTRIAL CO LTD, 2024

A multifunctional phone case that can hold cards and be carried like a wallet. The case has a removable card holder sleeve that attaches to the back of the case. The sleeve has a sub-buckle on the back and a cover with a female button on the front. The buckle and button connect to secure the sleeve and hold cards. The case also has connectors to attach a shoulder strap and a keychain. The strap allows carrying the case hands-free. The keychain lets the strap be detached for everyday use.

CN220293187U-patent-drawing

3. Mobile Phone Case with Integrated Bottom Wall Card Slot and Detachable Ring Chain

PANZHIHUA UNIVERSITY, UNIV PANZHIHUA, 2023

A mobile phone case that has a built-in card slot inside the case for convenient storage of cards like IDs and bank cards. The slot is on the bottom wall of the case and is sized to fit cards. This eliminates the need for an external card holder or pouch. The case also has a removable ring chain that attaches to the case and can be worn on a finger to secure the phone. This reduces the risk of dropping the phone. The chain can also be used as a stand when removed.

4. Mobile Phone Case with Integrated Card Holder Featuring Slanted Wing Pusher Mechanism

Shin Hyun-jin, SHIN HYEON JIN, 2023

Mobile phone case with an integrated card holder that allows easy and convenient card retrieval. The case has a dedicated card storage compartment. Inside, a pusher with a slanted wing contacts the card and pushes it upward when the phone is removed. This prevents card loss and allows one-handed card retrieval. The compartment has angled entry and exit slopes to guide the card in and out.

KR20230002180U-patent-drawing

5. Mobile Phone Case with Angled Card Insertion Port and Secure Storage Groove

HAA INC KOREA, KIL SANG PIL, 2023

Card storage mobile phone case with convenient card insertion and withdrawal features. The case has a storage groove, card insertion port, and lower exposure port to easily store cards on the back of the phone. The insertion port has an angled guide, seating groove, and finger guide to accurately insert cards. The lower port exposes a corner for easy card removal. A step diagonal wrapping prevents unintentional card ejection. Elastic rear and rail allow multiple card storage.

6. Mobile Phone Case with Detachable Hinged Card Holder and Magnetic Clamping Mechanism

FOSHAN SHENLONGDA TECH CO LTD, FOSHAN SHENLONGDA TECHNOLOGY CO LTD, 2023

Mobile phone case with integrated wallet functionality. The case has a detachable card holder that attaches to the back of the case. The card holder has two clamping plates that connect with a hinge. One plate has magnetic buckles and the other has a magnetic cover. When the buckles attach to the cover, the plates clamp together to secure cards. The buckles are magnetically attracted to the cover. The buckles have openings for cards and one has a transparent fabric layer for IDs. The case also has escape holes for phone buttons and speakers, covered by caps.

CN219643957U-patent-drawing

7. Foldable Mobile Device Case with Card Slot Retainer Mechanism

Jeffrey Lietzke, 2023

A foldable wallet-style mobile device case with card slots that prevent cards from falling out when the case is closed. The case has a first flap with card slots and a second flap for the mobile device. When the case is closed, a retainer attaches to the first flap and covers the card slots. The retainer prevents cards from sliding out perpendicular to the fold axis.

US20230225473A1-patent-drawing

8. Mobile Device Case with Foldable Flap and Retainer-Blocked Card Slots

Jeffrey Lietzke, 2023

Mobile device case with a foldable wallet design that prevents cards from falling out. The case has a foldable flap configuration with a central portion connecting the flaps. One flap holds the device, the other has card slots. A retainer is attached to the first flap and can be detached from the second flap. When closed, the retainer blocks over the card slots. Cards are inserted from the central portion side and move towards the flap edge. The retainer prevents cards from sliding out when closing.

US2023225473A1-patent-drawing

9. Foldable Phone Case with Integrated Wallet and Dual Compartment Structure

Kim Hyun-ji, KIM HYUN-JI, 2023

Foldable phone case with integrated wallet that provides secure storage for both the phone and cards/bills. The case has a foldable body that protects the folded phone when closed. Inside the body are card holders for business cards, IDs, etc. The body opens like a book to reveal the folded phone. The case also has separate upper and lower storage compartments for the phone halves. This protects the folded phone from impact. The foldable wallet allows storing cards, bills, etc inside the case.

10. Mobile Phone Case with Sliding Card Compartment and Integrated Stopper Mechanism

Choi Jung-wook, 2023

Mobile phone case that allows easy access to cards stored inside the case without needing tools or complex mechanisms. The case has a compartment for storing cards on the back surface. The compartment has a sliding entrance with a moving groove and guide rails to smoothly slide cards in and out. The entrance has a stopper to limit card travel. When a card is inserted, the moving groove exposes the card for easy access. The case also has a protruding stopper in the compartment to prevent cards from falling out. This allows convenient card storage and retrieval without needing tools or complex mechanisms.

11. Cell Phone Case with Card Slots Featuring Protrusion-Enhanced Retention Mechanism

CHOI IN HO, 2023

A cell phone case with a card loss prevention feature to securely store cards inside the case without risk of falling out. The case has a front cover with card slots that have a cover over them. The card separation prevention cover has a protrusion that touches the cards inside the slots when closed. This prevents the cards from sliding out. The cover can also detach from the front for easier card access.

KR102504632B1-patent-drawing

12. Wallet-Style Phone Case with Detachable Card Storage and Antibacterial Construction

KIM HACK SUNG, 2023

A wallet-style phone case with detachable card storage that makes it easy to hold and use the phone with one left hand, and prevents card loss. The case body attaches to the phone, the cover folds on the right, and the base on the left. Inner card storage is in the cover, outer storage on the base. A loss prevention cover over the outer storage folds open/closed. The case parts are made of antibacterial material.

KR102496231B1-patent-drawing

13. Mobile Phone Case with Integrated Card Storage Compartment Featuring Elastic Retention Mechanism

DONGGUAN HONGXUN PLASTIC TECH CO LTD, DONGGUAN HONGXUN PLASTIC TECHNOLOGY CO LTD, 2023

Mobile phone case that has a built-in card storage compartment on the back. The compartment has a fixed block with a missing section and a card slot. A card can be inserted into the slot and pressed by an elastic sheet through the connection hole in the fixed block. This allows cards to be conveniently stored inside the phone case instead of carrying a separate wallet or bag.

CN218450192U-patent-drawing

14. Removable Mobile Phone Case Pocket with Attachment Mechanism and Integrated Support Strap

Marisa A. James, 2022

A removable pocket that attaches to a mobile phone case to provide an add-on pouch for holding personal items like credit cards, money, and keys. The pocket attaches to the back of the case between the camera and the charging port. It can prop the phone up, enhance grip, and has a strap that allows the phone to rest on the hand without gripping it tightly. The pouch can be quickly released to wirelessly charge the phone or mounted in a car holder.

US11412079B1-patent-drawing

15. Smartphone Case with Rotating Cover and Integrated Wallet Featuring Sensor-Activated Alert System

KIM DO YOUNG, 2022

A wallet-combined smartphone case with features to prevent card/cash loss, protect the phone, and allow viewing. The case has a cover for the phone back, a rotating cover over an internal pocket, locking mechanism, and adjustable opening stages. When the rotating cover is closed, sensors detect opening and alert the user to prevent card loss. The adjustable stages allow selective access to outer cards. The rotating cover can stand the phone upright for viewing.

16. Phone Case with Card Compartment and Integrated Ejector Mechanism

Capital One Services, LLC, 2022

A phone case with a compartment for holding cards that can be ejected for easy access. The case has a compartment for holding cards like credit cards. An ejector mechanism inside the compartment allows the cards to be pushed out for easy access. This can be done using a slider or expanding mechanism that extends into the compartment and pushes the cards out of the open side.

US11349519B2-patent-drawing

17. Protective Mobile Phone Cover with Integrated Wallet and Detachable Cord Attachment

Arsen Melikyan, 2022

Mobile phone protective cover with a built-in wallet and detachable cord. The cover has a wallet component and a recessed area on the front for attaching a cord. When detached from the cord, the phone can be worn around the neck or wrist. The wallet can securely store cash and cards and protect the phone.

US20220123777A1-patent-drawing

18. Integrated Flat Wallet Attachment for Smartphone Cases with Sewn Material Design

LI MUSHENG, 2022

Flat and thin wallet case for smartphones that can hold items like cash and cards without adding bulk. The wallet integrates with the phone case and has a thin profile that can be easily carried in a pocket or bag. The wallet attaches directly to the phone case bottom instead of having a separate bulky wallet attachment. This allows carrying important items along with the phone without increasing thickness. The wallet material is sewn onto the phone case outer surface.

CN215871517U-patent-drawing

19. Mobile Phone Case with Inclined Plate and Suction-Cup Sliding Block for Card Slot Access

ZHI DONGBO, 2022

Mobile phone case with a slot for ID cards and bank cards that makes it easy to access and remove the cards without getting stuck. The case has a card slot with an inclined plate and a sliding block. The sliding block has a suction cup to hold the cards. When the block is pushed up, the cards slide up the incline and out of the slot. This allows removing the cards without fully extracting them.

20. Mobile Phone Case with Hinged Lid Card Compartment, Necklace Mount, and Integrated Shock Absorption

EDZN CORP, 2021

Door-type mobile phone case with card and bill storage that allows slim form factor, secure card storage, and necklace attachment. The case has a recessed compartment to hold cards and bills, accessible by a hinged lid. The compartment has a clip structure to secure cards. The lid has magnets to seal it. The case also has a cradle that folds out to support the phone. It can be mounted on a necklace. A shock-absorbing section on the back of the phone protects against drops. The case can have a radio shield and absorption areas to block RFID signals. It can have a power bank, LED light strip, and wireless charging.

KR20210110527A-patent-drawing

21. Biometric Wallet with Spring-Loaded Lever Mechanism and Integrated Fingerprint Reader, NFC Antenna, and Display

Michael Peter Shields, 2021

Biometric wallet with integral lever mechanism for securely holding multiple credit cards and bills. The wallet has a spring-loaded lever that can rotate up to open the spring and easily insert/remove cards and bills when unlatched. When closed and latched, the spring pressure secures the contents. The lever has an embedded fingerprint reader for biometric security and an NFC antenna for contactless payments. The lever can also have a display for selecting cards. The wallet may also copy card data and fingerprints for secure transactions and supports cards in a cell phone case.

22. Mobile Phone Case with Detachable Payment Card Holder and Sliding Access Mechanism

Mastercard International Incorporated, 2021

A mobile phone case that also securely stores a payment card in a detachable portion. The card can slide out of the detachable portion to expose the magnetic stripe and contact pads for contactless and chip-based payments. This allows users to leave their physical wallet at home and still make payments using the exposed card in situations where contactless mobile payments are not accepted. The detachable card portion can slide out even if the phone case is still attached, providing flexibility for situations where handing over the entire phone is inconvenient.

23. Card Storage Cell Phone Case with Integrated Slot and Secure Retention Features

KIM DAE WON, 2021

A card storage cell phone case that allows storing cards inside the case instead of carrying a separate wallet. The case has a slot on one side to slide cards in. The rear of the case has features to prevent cards from falling out or sliding too far. It can have a protrusion or elastic member to secure cards. The rear can also have a depth limit and withdrawal groove. The case body can be made of PC, while the side with the slot is soft. This allows secure card storage and access inside the case.

KR20210087191A-patent-drawing

24. Mobile Phone Case with Side Slot and Magnetic Closure for Card Storage

GUANGZHOU SUPERCASE IND CO LTD, GUANGZHOU SUPERCASE INDUSTRY CO LTD, 2021

Mobile phone case with integrated card storage that allows easy access and removal of cards without having to take the case off. The case has a slot for cards on the side away from the phone. The slot has a main magnet strip. The slot cover has a secondary magnet strip that attracts the main magnet. This keeps the cover closed but allows quick opening by sliding a finger into the gap between the cover and case side wall. The cover extends further along the side wall than just being flush with the case, making it easier to push open.

CN213043729U-patent-drawing

25. Mobile Phone Case with Integrated Cowhide Card Holder and Hinge-Activated Card Slots

ORDOS INSTITUTE OF TECH, ORDOS INSTITUTE OF TECHNOLOGY, 2021

A card-type mobile phone case that integrates a wallet function into a phone case. The case has a main body with camera and fingerprint ports on the back. Below those ports is a cowhide card case with multiple card slots. Each slot has a pocket sewn to the case wall. The pocket has an upper layer fixed to the inner wall and a lower layer fixed to the outer wall. This creates a pocket with a hinge that opens when the case is closed and holds the cards securely when the case is opened.

26. Mobile Phone Case with Rotatable Card Holder and Integrated Mounting Mechanism

XINJIANG AGRICULTURAL VOCATIONAL TECHNICAL COLLEGE, 2021

Card-pluggable portable mobile phone case with a removable card holder that can be attached to the case or carried separately. The case has a mounting seat, block, and bag that allows the card holder to be inserted and rotated. The card holder has a pocket with a slot to hold IC cards. This allows convenient access to cards without needing to carry them separately, prevents loss, and improves case functionality.

27. Mobile Phone Case with Integrated Elastic Pocket and Elastic Opening Mechanism

ZENG JIAYI, 2021

Mobile phone case with a built-in elastic pocket to securely store small items like coins without them falling out when the phone is removed. The case has a compartment to hold the phone, with an elastic cloth at the bottom. The cloth forms an elastic opening between itself and the compartment bottom. This creates an elastic pocket that holds items like coins when the phone is removed, preventing them from falling out.

CN112398997A-patent-drawing

28. Mobile Phone Case with Internal Card Storage and Sliding Access Mechanism

CHOI JUNG WOOK, 2020

Mobile phone case with an internal card storage compartment that allows easy access to cards stored inside the case. The compartment has a sliding mechanism to move the cards out when needed. The cards are inserted into a dedicated card storage area on the inner surface of the case. A sliding groove exposes the cards for easy retrieval without needing to dig them out. This prevents card loss and damage inside the case while still allowing quick access.

29. Cellular Phone Rigid Shell Wallet with Card Recess and Removable Dashboard Mount Integration

Handstands Promo, LLC, 2020

A combination mount and wallet for a cellular phone that can be removably mounted to a vehicle dashboard while providing a secure pocket to hold cards like credit cards on the back of the phone. The phone wallet has a rigid shell that attaches to the phone with adhesive. The inner side of the shell has a recess to hold cards, with a strap that loops over the open side of the recess to secure the cards inside. The wallet can also be coupled to a removable vehicle dashboard mount.

30. Mobile Phone Case with Integrated Fixed Wallet and Safety Hammer Slot

KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY, UNIV KUNMING SCIENCE & TECH, 2020

A multifunctional mobile phone case that combines a wallet, safety hammer, and phone protection in one device. The case has a fixed wallet attached to the back with super glue. The wallet has compartments for cards, change, and a zipper to connect it to the case. The safety hammer is housed in a dedicated slot. This allows carrying essentials like cards, cash, and a hammer in one convenient location with the phone. The wallet attaches to the case to prevent items from falling out.

CN211209741U-patent-drawing

31. Removable Mobile Device Wallet with Elastomeric Card-Gripping Cushion and Detachable Holders

HSBC BANK USA NA, 2020

A removable wallet for mobile devices that can be attached to device cases without adhesive to enable wireless charging. The wallet has pockets to hold cards and an elastomeric cushion inside to securely grip the cards without adding thickness. The cushion applies force to the card edges in the length or width directions instead of thickness to reduce wallet thickness. The wallet attaches to device cases via detachable holders. This allows the wallet to be easily separated and carried separately for convenience. It also enables wireless charging when the wallet is removed since it doesn't add bulk to the device.

32. Protective Case with Dual Compartments and Flexible Inner Layer for Device and Card Separation

Samsonite IP Holdings S.à r.l., 2020

A protective case for holding a personal electronic device like a phone and multiple cards like credit cards, IDs, or business cards. The case has two compartments, one for the device and one for the cards. The device compartment has a rigid outer layer and a flexible inner layer that can deform to hold the device tightly. The card compartment is separated from the device compartment by the flexible inner layer, protecting the device from scratches when cards are inserted. The case folds closed with the devices and cards inside.

33. Wearable Mobile Phone Case with Integrated Neck Strap and Credit Card Holder

Bryan C. Hines-Lucas, 2020

A hands-free cell phone case that can be worn around the neck and also has a credit card holder. The case has a strap that can be worn like a necklace, allowing the user to have their phone easily accessible without needing to hold it. The case also has a slot or pocket for storing credit cards or other small items. This provides convenience and easy access to both the phone and cards while keeping hands free.

34. Phone Case with External Actuated Card Ejector Mechanism

Capital One Services, LLC, 2020

A phone case with an ejector mechanism allows users to easily access and remove cards from a compartment within the case. The ejector can be actuated externally to push the card out.

US10630333B1-patent-drawing

35. Mobile Device Case with Recessed Card Slot and Securing Detents

Slide and Swipe, LLC, 2020

A mobile device case with an embedded card holder allows you to conveniently carry a credit card, business card, or other card. The case has a card slot recessed into the back. An opening on the side of the case allows you to slide the card in. Detents in the slot secure the card from falling out. The recessed slot protects the phone from being scratched when a card is inserted.

36. Dual-Body Phone Case with Segregated Card, Bill, and Coin Compartments

Park Jin-hwan, 2020

A wallet-style phone case that allows storing cards, bills, and coins along with the phone without needing a separate wallet. The case has two bodies, one for the phone and one for cards/wallet items. The wallet body has separate compartments for cards and bills, with a coin storage area between them. This allows bills to be stored outside the coin area while coins are inside. This prevents creasing bills when storing them with coins. The coin area also keeps coins securely inside the case.

KR200491398Y1-patent-drawing

37. Carrying Case with Hinged Panel and Integrated Card Pockets

Rachel Coicou, 2020

A carrying case for a cellphone and cards with a panel for the cellphone and a hinged panel with card pockets. The case closes with a flap and lock.

US20200093237A1-patent-drawing

38. Hinged Carrying Case with Dual-Panel Design for Cellphone and Card Storage

Rachel Coicou, 2020

A carrying case for simultaneously holding a cellphone and multiple cards. The case has a hinged design where the cellphone goes on one panel and cards go in pockets on the other panel. When closed, the panels form a secure case around the phone and cards. A lock engages a closure flap to prevent opening.

US2020093237A1-patent-drawing

39. Cell Phone Case with Detachable Sliding Card Storage Section and Elastic Hook Connection

ISPEAKER CO., LTD., 2019

A cell phone case that allows convenient and secure storage of cards like credit cards without needing a separate wallet. The case has a main body that holds the phone and a detachable card storage section. The storage section has a sliding cover to open and close it. The main body has an opening to accommodate the storage section. The two parts are connected by elastic hooks. This allows the storage section to slide back and forth to access the cards.

40. Mobile Phone Case with Integrated Sliding Card Compartment and Access Mechanism

CHOI JUNG WOOK, 2019

Mobile phone case with integrated card storage and easy card access. The case has a card receiving compartment inside to hold cards. The compartment has a sliding entrance to insert and withdraw cards. A moving groove exposes part of the card when slid. Guides and stoppers prevent card loss. This allows quick card access without separating the case.

KR102056653B1-patent-drawing

41. Mobile Phone Case with Integrated Card Storage Compartment and Exit Blocking Cover

XU LUNHUANG, 2019

Mobile phone case with integrated card storage compartment to keep cards like business cards, IDs, and tickets securely attached to the phone. The case has a card box on the back that allows cards to be inserted and stored. This prevents cards from falling out and getting lost when carrying the phone. A blocking cover at the card box exit prevents cards from sliding out accidentally.

42. Mobile Phone Case with Integrated Hidden Cash Compartment

JIANGSU VOCATIONAL COLLEGE OF INF TECH, JIANGSU VOCATIONAL COLLEGE OF INFORMATION TECHNOLOGY, 2019

A mobile phone case with a built-in compartment to carry a small amount of cash without using a separate wallet. The case has a hidden compartment accessible through a discreet opening that can hold banknotes. This allows users to conveniently carry a few bills with their phone without needing a separate wallet.

CN209676315U-patent-drawing

43. Mobile Device Case with Triangular Ridge Impact Absorption and Integrated Card Pocket

Samsonite IP Holdings S.àr.l., 2019

A mobile device case with improved impact protection and a card pocket. The case has a shape that surrounds and protects the device. The inside of the case has triangular ridges that deform on impact to absorb shock. The case cover has a pocket to hold cards.

US20190208878A1-patent-drawing

44. Mobile Phone Case with Integrated Card Storage Compartment and Access Cover

ISPEAKER CO., LTD., 2019

Mobile phone case with a card storage compartment between the case and a cover. The case has a phone holder on the front and a card slot on the back. The cover opens/closes an opening to access the cards.

45. Mobile Phone Case with Integrated Cable Reel and Coin Storage Compartments

Fuzhou Xinxiangyuan Information Technology Co., Ltd., 2019

Mobile phone case with integrated storage compartments for a data cable and coins. The case has a housing with a recessed slot to hold a cover. Inside the cover, a first groove has a movable rod and a limit block. A reel with a card slot is wound around the limit block. Inside the housing, a storage box has a second groove with a movable rod and spring. The rods connect to the limit block. The box can hold coins. The case also has a rotating shaft and slot for attaching the phone.

CN208401944U-patent-drawing

46. Cell Phone Case with Front Cover Sliding Tray for Integrated Card Storage

Hanaro Telecom Co., Ltd., 2018

A cell phone case with integrated card storage that allows easy access to cards like credit cards and transportation cards without removing the phone. The case has a sliding tray on the front cover that holds the cards. The tray can be pushed and pulled to insert and withdraw cards from the compartment. This provides convenient card access without separating the phone and case.

KR200487037Y1-patent-drawing

47. Mobile Phone Case with Integrated Card Storage, Embossing Protrusion, and Outgoing Withdrawal Grooves

Yang Ji-ho, 2018

Mobile phone case that allows storing a card like credit card or ID card inside the case without requiring a separate card wallet. The case has an opening with a depth greater than the card thickness and an embossing protrusion. The protrusion prevents the card from falling out when the case is dropped. Inside the opening, there are outgoing grooves for withdrawing the card and support means to keep the card from separating. This allows easy one-touch card access by pulling the card through the opening.

KR20180079940A-patent-drawing

48. Mobile Phone Case with Integrated Card Storage Compartment and Hinged Access Cover

ISPEAKER CO., LTD., 2018

Mobile phone case with a card storage compartment that can securely store cards like credit cards, IDs, etc. The case has a cover that opens and closes to access the card compartment.

US20180191395A1-patent-drawing

49. Mobile Device Case with Partially Open Back Wall Pocket and Biased Flap for Card Storage

TECH 21 LICENSING LTD, 2018

A case for a mobile device like a smartphone that allows convenient storage and retrieval of cards without a cover. The case has a pocket on the back wall for holding cards. The pocket is deep to maximize space but the back wall is partially open. This allows the device to partially form one side of the pocket when inserted. When removed, the cards don't fall out. A flap extends across less than half the width of the back wall and is biased closed. It provides access to the cards without a bulky cover. The flap is small and resilient to feel good to use.

50. Mobile Phone Case with Sliding Card Slot and Rotatable Mounting Pedestal

Kim Seol-ah, 2018

A mobile phone case that allows easy card access while also being able to mount the phone. The case has an inner case to hold the phone and an outer case with a sliding card slot. The card slot has a hinged cover that rotates to expose the card. This allows the user to slide the card into the case for storage, then rotate the cover to access the card without removing the phone. The case also has a mounting pedestal that attaches to the phone and rotates to adjust the viewing angle.

KR20180001717U-patent-drawing

51. Mobile Device Case with Integrated Recessed Card Slot Featuring Guiding Rails, Retainer, and Protective Raised Edges

52. Detachable Mobile Device Storage Case with Elastic Hinge and Integrated Mirror

53. Hinged Smartphone Case with Lockable Wallet Flap and Integrated Closure Mechanism

54. Mobile Phone Case with Integrated Card Slot and Secure Guide Groove System

55. Smartphone Case with Detachable External Card Holder Featuring Recessed Storage and Impact-Absorbing Gap

Several methods for meeting user needs, such as hands-free carrying, multifunctionality, simple card access, and safe card storage, are demonstrated in these patents. Every innovation attempts to address the difficulties of incorporating storage spaces into a thin and sturdy phone cover.

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