Zelin Zhang

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Foshan, CN

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Patents Grantslast 30 patents

Information Patent Grant
Wheeled walker wheel direction lock apparatus and method
- Patent number 10,555,866
- Issue date Feb 11, 2020
- Protostar, Inc., a Delaware Corporation
- Yichuan Pan
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Wheeled walker
- Patent number D874351
- Issue date Feb 4, 2020
- Protostar, Inc., a Delaware Corporation
- Peter James Fellingham
- D12 - Transportation
Information Patent Grant
Wheeled walker with a moveable seat
- Patent number 10,434,031
- Issue date Oct 8, 2019
- Protostar, Inc., a Delaware Corporation
- Yichuan Pan
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Wheeled walker with a movable seat
- Patent number 10,307,321
- Issue date Jun 4, 2019
- Protostar, Inc., a Delaware Corporation
- Yichuan Pan
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

Information Patent Application
Wheeled Walker with a Moveable Seat
- Publication number 20190247266
- Publication date Aug 15, 2019
- Protostar, Inc., a Delaware Corporation
- Yichuan Pan
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Wheeled Walker Wheel Direction Lock Apparatus and Method
- Publication number 20190105220
- Publication date Apr 11, 2019
- Protostar, Inc., a Delaware Corporation
- Yichuan Pan
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Wheeled Walker with a Movable Seat
- Publication number 20190105221
- Publication date Apr 11, 2019
- Protostar, Inc., a Delaware Corporation
- Yichuan Pan
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE