Robert G. Mathias

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Brookfield, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Special effects circuit for an electronic organ
- Patent number 4,214,502
- Issue date Jul 29, 1980
- Marmon Company
- Robert J. Holpuch
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Voltage controlled filter
- Patent number 4,023,113
- Issue date May 10, 1977
- Hammond Corporation
- Robert G. Mathias
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Musical instrument rhythm programmer having provision for automatic...
- Patent number 3,958,483
- Issue date May 25, 1976
- Hammond Corporation
- Alexander J. Borrevik
- G10 - MUSICAL INSTRUMENTS ACOUSTICS