Granted Patent
Utility
US 4,298,330 · App. 06/086,984
Curved mandrel for curing polymeric hose and method
Inventor:
Richard F. Davis
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Oct 22, 1979
Inventor
Richard F. Davis
Assignee (at issue)
DayCo Holdings, LP
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.