Granted Patent
Utility
US 5,341,920 · App. 08/060,893
Load sensitive conveyor training apparatus
Inventor:
Shirley Donnelly Riffe
Patented Case
View Patent ↗
Granted: Aug 30, 1994
Filed: May 12, 1993
Inventor
Shirley Donnelly Riffe
Assignee (at issue)
Long-Airdox 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.