Title:
CARD-LIKE OBJECT WITH INVISIBLE INDICIA AND APPARATUS FOR DETECTING AND DISPLAYING SAME
United States Patent 3466775
Inventors:
Smith, Melville H.
Publication Date:
09/16/1969
Export Citation:
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Assignee:
Melville, Smith H.
Primary Class:
40/463
Other Classes:
40/476, 235/441, 235/475, 235/484, 235/492, 250/271, 273/139, 283/89, 283/901
International Classes:
A63F3/06; G07C15/00; A63F3/06; G07C15/00; (IPC1-7): G09F11/14
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US Patent References:
3279826Credential
3096882Data processing
3045529Data processing
2294751Record card controlled machine




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