IP Library › Granted Patent US 4,840,360
Granted Patent Utility
US 4,840,360 · App. 07/183,943

Expanding mandrel

Inventor: Donald L. Bartley
Patented Case View Patent ↗
Granted: Jun 20, 1989 Filed: Apr 20, 1988
Inventor
Donald L. Bartley
Assignee (at issue)
KENNAMETAL INC.

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Quick Facts
Patent No.
US 4,840,360
App. No.
07/183,943
Filed
1988-04-20
Granted
1989-06-20
Kind
A