Title:
Printing plate grooving machine
Document Type and Number:
United States Patent 2305338


Inventors:
Barber, Howard M.
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Publication Date:
12/15/1942
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Assignee:
COTTRELL C B & SONS CO
Primary Class:
29/21
Other Classes:
83/875, 83/453, 409/226
International Classes:
B41F27/10; B41F27/00