Title:
PROTECTED STENCIL APERTURE CARD
United States Patent 3421241
Inventors:
Hochberg, David Louis
Publication Date:
01/14/1969
Export Citation:
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Assignee:
Pitney, Bowes
Primary Class:
40/124.191
Other Classes:
40/773, D14/483
International Classes:
G06K19/02; G06K19/02; (IPC1-7): G09F1/10; B42D15/00; G09F19/12
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US Patent References:
2984921Microfilm record card
2648924Label structure
2557402Display sign
1498895Stencil
1179081N/A




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