Granted Patent
Utility
US 5,279,194 · App. 07/835,158
Ball lock assembly without a canister
Inventor:
William D. Armbrust
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Feb 13, 1992
Inventor
William D. Armbrust
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.