Microfilm record card
United States Patent 2984921
US Patent References:
Record card
- - 2633655
Film record card and method and apparatus for its production
- - 2690021
Film record cards and method of making the same
- - 2859550
Record card
- - 2633655
Film record card and method and apparatus for its production
- - 2690021
Film record cards and method of making the same
- - 2859550
Inventors:
Herzig, Leonard A.
Publication Date:
05/23/1961
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Export Citation:
Assignee:
P C I INC
Primary Class:
Other Classes:
493/379, 235/487, 40/703, 493/944, 235/489
International Classes:
B42F19/00; G03B21/64; G06K19/02; G03B21/54