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David J. Petschulat
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Fullerton, CA, US
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last 30 patents
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Patent Grant
Vibrato palm rest
Patent number
4,802,397
Issue date
Feb 7, 1989
David J. Petschulat
G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Patent Grant
Adjustable string contact system for a musical instrument
Patent number
4,777,858
Issue date
Oct 18, 1988
David J. Petschulat
G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Patent Grant
Manual string lock with adjustable locking action
Patent number
4,667,561
Issue date
May 26, 1987
David C. Storey
G10 - MUSICAL INSTRUMENTS ACOUSTICS