Hoi Him Ko

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Chai Wan, HK

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Patents Grantslast 30 patents

Information Patent Grant
Transducer device
- Patent number 10,591,949
- Issue date Mar 17, 2020
- Defond Components Limited
- Cheng Chen Nieh
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
TRANSDUCER DEVICE
- Publication number 20190086945
- Publication date Mar 21, 2019
- Defond Components Limited
- Cheng Chen Nieh
- G05 - CONTROLLING REGULATING