Granted Patent
Utility
US 4,265,587 · App. 06/060,267
Quick-coupling locking mechanism
Inventor:
James W. Clark
Patented Case
View Patent ↗
Granted: May 5, 1981
Filed: Jul 25, 1979
Inventor
James W. Clark
Assignee (at issue)
Envirotech, 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.