Granted Patent
Utility
US 4,823,927 · App. 07/089,358
Retractable roller system for cargo handling
Inventor:
Richard H. Jensen
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Aug 24, 1987
Inventor
Richard H. Jensen
Assignee (at issue)
Ancra 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.