Granted Patent
Utility
US 4,838,291 · App. 07/263,980
Axilliary crutch
Inventor:
Fred DiVito
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Oct 25, 1988
Inventor
Fred DiVito
Assignee (at issue)
Lumex, 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.