Granted Patent
Utility
US 5,938,367 · App. 08/907,545
Automatic piston lock mechanism
Inventor:
David S. Olson
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: Aug 8, 1997
Inventor
David S. Olson
Assignee (at issue)
United Fixtures Company
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.