William R. Querfurth

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Phoenix, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Audio tone controller system, method, and apparatus
- Patent number 6,967,277
- Issue date Nov 22, 2005
- William Querfurth
- G10 - MUSICAL INSTRUMENTS ACOUSTICS

Patents Applicationslast 30 patents

Information Patent Application
Audio tone controller system, method , and apparatus
- Publication number 20050034590
- Publication date Feb 17, 2005
- William R. Querfurth
- G10 - MUSICAL INSTRUMENTS ACOUSTICS