Title:
BASS REGISTER KEYING SYSTEM
United States Patent 3470306

Inventors:
Hadden, George H.
Publication Date:
09/30/1969
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Assignee:
BALDWIN CO D H
Primary Class:
84/684
Other Classes:
84/DIG.002, 327/58, 84/712, 984/348, 84/DIG.022, 84/721, 984/339
International Classes:
G10H1/22; G10H1/38; G10H1/06
US Patent References:
3240857Switching system for electrical organs
3333041Keying systems for electrical musical instruments for producing steadystate or percussive type tones either separately or concurrently




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