Kah Hooi Vincent Ong

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Singapore, SG

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Patents Grantslast 30 patents

Information Patent Grant
Hearing aid device with an on/off switch
- Patent number 8,270,646
- Issue date Sep 18, 2012
- Siemens Medical Instruments Ptd. Ltd.
- Markus Heerlein
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Hearing Aid Device
- Publication number 20090136069
- Publication date May 28, 2009
- Markus Heerlein
- H04 - ELECTRIC COMMUNICATION TECHNIQUE