Granted Patent
Utility
US 4,977,981 · App. 07/335,331
Wayside lift
Inventor:
Gregory J. Paquin
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Apr 10, 1989
Inventor
Gregory J. Paquin
Assignee (at issue)
Ricon Corp.
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.