John P. Bertsch

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Victoria, CA

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Patents Grantslast 30 patents

Information Patent Grant
Musical entertainment system
- Patent number 5,428,708
- Issue date Jun 27, 1995
- IVL Technologies Ltd.
- Brian C. Gibson
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Method and apparatus for generating vocal harmonies
- Patent number 5,301,259
- Issue date Apr 5, 1994
- IVL Technologies Ltd.
- Brian C. Gibson
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Method and apparatus for generating vocal harmonies
- Patent number 5,231,671
- Issue date Jul 27, 1993
- IVL Technologies, Ltd.
- Brian C. Gibson
- G10 - MUSICAL INSTRUMENTS ACOUSTICS