IP Library › Granted Patent US 4,688,457
Granted Patent Utility
US 4,688,457 · App. 06/787,701

Heavy duty paper punch

Inventors: Hildaur L. Neilsen, Richard A. Davi
Patented Case View Patent ↗
Granted: Aug 25, 1987 Filed: Oct 15, 1985
Inventors
Hildaur L. Neilsen
Richard A. Davi
Assignee (at issue)
Rolodex Corporation

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Quick Facts
Patent No.
US 4,688,457
App. No.
06/787,701
Filed
1985-10-15
Granted
1987-08-25
Kind
A