John Koah

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Hermosa Beach, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Auditory board
- Patent number 8,847,057
- Issue date Sep 30, 2014
- John Koah
- G10 - MUSICAL INSTRUMENTS ACOUSTICS

Patents Applicationslast 30 patents

Information Patent Application
Auditory Board
- Publication number 20130305910
- Publication date Nov 21, 2013
- John Koah
- G10 - MUSICAL INSTRUMENTS ACOUSTICS