Granted Patent
Utility
US 4,583,711 · App. 06/749,846
Rigid mount coupler with flow check stop
Inventor:
Lyle R. Johnson
Patented Case
View Patent ↗
Granted: Apr 22, 1986
Filed: Jun 28, 1985
Inventor
Lyle R. Johnson
Assignee (at issue)
Parker-Hannifin Corporation
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.