Granted Patent
Utility
US 5,440,773 · App. 08/118,230
Foldable ramp
Inventor:
Robert Lentini
Patented Case
View Patent ↗
Granted: Aug 15, 1995
Filed: Sep 9, 1993
Inventor
Robert Lentini
Assignee (at issue)
DAWS MANUFACTURING COMPANY, 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.