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United States Patent 2245142

Inventors:
Pickering, Crosman Loring
Publication Date:
06/10/1941
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Assignee:
Monroe, Calculating Machine
Primary Class:
400/574.100
Other Classes:
400/575.100, 400/575.200
International Classes:
B41J11/38; B41J19/84; B41J11/36; B41J19/00