Title:
PROTECTED STENCIL APERTURE CARD
United States Patent 3421241
US Patent References:
/1179081.html
- - 1179081

Stencil
- - 1498895

Display sign
- - 2557402

Label structure
- - 2648924

Microfilm record card
- - 2984921


Inventors:
Hochberg, David Louis
Publication Date:
01/14/1969
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Assignee:
Pitney, Bowes
Primary Class:
40/124.191
Other Classes:
D14/483, 40/773
International Classes:
G06K19/02; G09F19/12; B42D15/00; G09F1/10




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