Granted Patent
Utility
US 4,585,255 · App. 06/519,366
Heavy duty tube coupling
Inventor:
Ralph G. Ridenour
Patented Case
View Patent ↗
Granted: Apr 29, 1986
Filed: Aug 1, 1983
Inventor
Ralph G. Ridenour
Assignee (at issue)
Universal Enterprises, 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.