Title:
Signal control system
Document Type and Number:
United States Patent 3171893


Inventors:
Elmer, Burg
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Sponsored by:
Flash of Genius
Publication Date:
03/02/1965
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Assignee:
Elmer, Burg
Primary Class:
369/30.010
Other Classes:
369/69
International Classes:
G07F9/02
US Patent References:
1787644Phonographic attachment for merchandise-dispensing apparatus
1912226Newspaper crier and vending machine
2617888Line lockout arrangement
2741427Calculating machine with keyboard instrumentalities for binary to decimal conversion
2994736Keyboard access control system


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