Donald Bernard Koepke

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Franklin Park, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Tab switch mechanism for musical instruments
- Patent number 4,173,166
- Issue date Nov 6, 1979
- Thomas International Corporation
- Donald B. Koepke
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Double touch key for musical instruments
- Patent number 3,935,784
- Issue date Feb 3, 1976
- Warwick Electronics Inc.
- Donald Bernard Koepke
- G10 - MUSICAL INSTRUMENTS ACOUSTICS