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Barbara A. Allen
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Bloomington, IN, US
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last 30 patents
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Patent Grant
Kettledrum
Patent number
4,730,531
Issue date
Mar 15, 1988
Barbara A. Allen
G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Patent Grant
Kettledrum
Patent number
4,674,390
Issue date
Jun 23, 1987
Barbara A. Allen
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Grant
Kettledrum
Patent number
4,635,524
Issue date
Jan 13, 1987
Barbara A. Allen
G10 - MUSICAL INSTRUMENTS ACOUSTICS