Stamp pads
United States Patent 2847972
US Patent References:
/0204726.html
- - 0204726

/0340761.html
- - 0340761

Self-inking stamp pad
- - 1538241

Ink pad
- - 2152682

Variable electrical resistor
- - 2375178


Inventors:
Rosenthal, Sidney N.
Publication Date:
08/19/1958
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Assignee:
Rosenthal, Sidney N.
Primary Class:
118/265
Other Classes:
427/256
International Classes:
B41K1/54; B41K1/00