APPARATUS FOR TUNING MUSICAL INSTRUMENTS
United States Patent 3509454
US Patent References:
Electronic organ
- - 2403090
Electronic interval timing method and system
- - 2566085
Electronic musical instrument
- - 3236931
Musical instrument tuning apparatus
- - 2153800
Frequency control by electronic counter chains
- - 2521789
Electronic organ
- - 2403090
Electronic interval timing method and system
- - 2566085
Electronic musical instrument
- - 3236931
Musical instrument tuning apparatus
- - 2153800
Frequency control by electronic counter chains
- - 2521789
Inventors:
Gossel, Dieter
Publication Date:
04/28/1970
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Export Citation:
Assignee:
PHILIPS CORP
Primary Class:
Other Classes:
84/454, 327/8, 984/353, 327/4
International Classes:
G10H1/44; G01R23/14
US Patent References:
| 2892944 | Signal generator |