Ka Hei Wong

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East Providence, RI, US

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Patents Grantslast 30 patents

Information Patent Grant
Pickup system for bridge of stringed musical instrument
- Patent number 5,911,171
- Issue date Jun 8, 1999
- Ka Hei Wong
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Tamper indicating label
- Patent number 5,893,587
- Issue date Apr 13, 1999
- Ka Hei Wong
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS