8 patents in this list

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Conventional nail polish application requires precise hand-eye coordination and typically achieves only 65-80% coverage uniformity in a single pass. Manual application exposes users to volatile organic compounds (VOCs) at concentrations of 1,200-1,800 parts per million during the 8-12 minutes needed for a complete manicure. Industry data shows that even experienced technicians spend 40% of application time on edge refinement and corrections.

The fundamental challenge lies in automating a process that requires simultaneous precision positioning, controlled fluid dispensing, and real-time adjustment to individual nail geometries.

This page brings together solutions from recent research—including sensor-guided applicator systems, AI-driven robotic positioning, integrated fume filtration mechanisms, and precision edge-control applicators. These and other approaches focus on achieving consistent application while reducing VOC exposure and minimizing the need for touch-ups.

1. AI-Driven Robotic System for Autonomous Nail Polish Application with Sensor-Based Precision

ELEMENTREE INC, 2020

Automatic nail polish application robot that uses AI and sensors to precisely paint nails without human assistance. The robot identifies nail locations, adjusts for movement, and applies nail polish using techniques like measured deposits, peel-off masks, or controlled sprays. It allows users to select polish colors and manicure styles through an interface. The robot uses cameras and sensors to analyze nail shapes and plan movements.

2. Electronic Nail Coating Device with Sensor-Guided Motorized Applicator and Interactive Streaming Capability

PREEMADONNA INC, 2020

An electronic device that applies nail coatings using sensors and motors to accurately coat nails. The device has touch-sensitive surfaces and cameras to detect nail locations. It can intelligently move an applicator to coat nails using motors in response to nail movements. The device can also stream nail coating sessions for multiple users to interact and share.

3. Mobile Device with Sensor-Guided Nail Polish Applicator and Interactive Display System

PREEMADONNA INC, 2017

Using a smartphone or mobile device to apply nail polish accurately and efficiently. The device has sensors to detect the location of the nail and motors to move an applicator to coat the nail. Touch and camera inputs guide the applicator. The device can also display content to entertain the user while coating. Multiple users can connect and view coating sessions.

4. Electronic Nail Coating System with Sensor-Guided Applicator and Camera-Assisted Nail Position Detection

PREEMADONNA INC, 2017

An electronic system for applying nail coatings using sensors, cameras, and motors to accurately and efficiently paint nails. The system involves detecting nail position using touch and camera, moving an applicator relative to the nail, and guiding the user to move their nail. It can connect users for virtual nail parties with theme-based sessions and rewards.

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5. Automatic Nail Painting Machine with Nail Shape Scanner, Precision Paint Application System, and Integrated Fume Filtration

UNIV FAR EAST, 2015

Automatic nail painting machine that allows users to have their nails painted without exposing themselves to volatile chemicals. The machine scans the nail to create a painting path, then uses a printer to apply the paint. The machine also has a filter system to remove toxic fumes from the paint as it's applied. The user's hands go into a covered space with inlets and outlets to prevent exposure to the fumes. The machine has a scanner to map the nail shape, a printer with moving parts to apply the paint, and a filter system to remove fumes.

6. Nail Polish Applicator with Multi-Sized Curved Tip Protrusions for Uniform Edge Application

BAXTER APRIL L, 2008

A nail polish applicator with multiple curved tips to easily apply nail polish with a uniform, curved border to the tips of fingernails and toenails. The applicator has a central hub with several differently sized protruding portions, each with a curved end. Loading nail polish onto one of the curved tips and applying it to a nail creates a curved border around the nail tip. The curved tips conform to the nail shape when pressed. This allows consistent, curved nail polish application without skill or steady hand required for freehand brushing.

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7. Automatic Nail Polish Coating Device with Adjustable Finger Holder and Dilution-Based Applicator System

NEW GOODS CO LTD, 2000

Automatic nail polish coating device that allows quick and uniform application of nail polish without protrusion or smudging. The device uses either a spray or roller applicator to apply diluted nail polish. The dilution allows easier and faster application. The diluted polish is then dried quickly. The applicator is inserted into a finger holder to expose just the nails. This ensures consistent coverage without over-applying to the skin. The holder also adjusts to fit different nail sizes.

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8. Handheld Nail Polish Applicator with Integrated Metering Pump and Plunger Control Mechanism

SCHWAN STABILO SCHWANHAEUSSER, 1990

A handheld nail polish applicator with a built-in metering pump to precisely dispense nail polish without the need for propellants. The applicator has a housing, a brush applicator, and a metering pump inside. The pump has a plunger that moves back and forth to dispense nail polish through a channel. The pump is operated by a control member that extends and retracts the plunger. The control member has features like a cam, snapping action, and tactile feedback to indicate when it's fully extended. This allows precise dispensing of nail polish without the user having to estimate how much they're applying.

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