Punch press mechanism
United States Patent 2431482

Inventors:
Richard, Hutchinson
Publication Date:
11/25/1947
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Assignee:
Richard, Hutchinson
Primary Class:
83/449
Other Classes:
83/686, 83/468
International Classes:
B21D28/04
US Patent References:
2068445Cutting machine
2214665Drilling machine
0814167
1168600
1360905Punching-machine
1382674Punching-machine
Foreign References:
FR1382674A