Title:
MANUAL ELECTRONIC KEYBOARD
United States Patent 3464531

Inventors:
Herr, Edward R.
Sumrall, George E.
Publication Date:
09/02/1969
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Assignee:
Army US.
Primary Class:
400/479
Other Classes:
400/491.200, 310/339, 200/181, 400/481, 341/34, 310/330
International Classes:
H03K17/96; H03K17/967; H04L13/16; H03K17/94; H04L13/00; H01V7/00; B41J5/08; B41J5/16
US Patent References:
3366808Keyboard key transducer
3333122Electrical device
3339104Solid state switch




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