Granted Patent
Utility
US 5,292,213 · App. 07/939,240
Coupling device for high-speed rotation
Inventors:
Ted R. Massa, David R. Siddle, John S. VanKirk
Patented Case
View Patent ↗
Granted: Mar 8, 1994
Filed: Sep 2, 1992
Inventors
Ted R. Massa
David R. Siddle
John S. VanKirk
Assignee (at issue)
KENNAMETAL INC.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.