IP Library › Granted Patent US 5,172,775
Granted Patent Utility
US 5,172,775 · App. 07/665,400

Rotary drill bit insert

Inventors: Daniel C. Sheirer, Gerald L. Woods, Robert H. Montgomery, Jr.
Patented Case View Patent ↗
Granted: Dec 22, 1992 Filed: Mar 6, 1991
Inventors
Daniel C. Sheirer
Gerald L. Woods
Robert H. Montgomery, Jr.
Assignee (at issue)
KENNAMETAL INC.

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Quick Facts
Patent No.
US 5,172,775
App. No.
07/665,400
Filed
1991-03-06
Granted
1992-12-22
Kind
A