Title:
MANUAL ELECTRONIC KEYBOARD
United States Patent 3464531
Inventors:
Herr, Edward R.
Sumrall, George E.
Publication Date:
09/02/1969
Export Citation:
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Assignee:
Army US.
Primary Class:
400/479
Other Classes:
200/181, 310/330, 310/339, 341/34, 400/481, 400/491.2
International Classes:
H03K17/96; H03K17/967; H04L13/16; H03K17/94; H04L13/00; (IPC1-7): B41J5/08; B41J5/16; H01V7/00
View Patent Images:
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US Patent References:
3366808Keyboard key transducer
3364451Switching device without spring contacts
3353038Signal generating arrangement for an electric typewriter and similar apparatus
3339104Solid state switch
3333122Electrical device
3076903Piezoelectric transducer
2302081Signaling system
2032168N/A




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