Granted Patent
Utility
US 5,404,909 · App. 07/897,179
Coupling device
Inventor:
Lowell R. Hanson
Patented Case
View Patent ↗
Granted: Apr 11, 1995
Filed: Jun 11, 1992
Inventor
Lowell R. Hanson
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.