Granted Patent
Utility
US 4,185,856 · App. 05/927,369
Pipe joint with remotely operable latch
Inventor:
John McCaskill
Patented Case
View Patent ↗
Granted: Jan 29, 1980
Filed: Jul 24, 1978
Inventor
John McCaskill
Assignee (at issue)
McEvoy Oilfield Equipment 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.