Granted Patent
Utility
US 4,353,436 · App. 06/140,928
Manual wheelchair lift
Inventors:
Leonard Rice, Marlin J. Freel, Gregory J. Paquin, Howard E. Burkett
Patented Case
View Patent ↗
Granted: Oct 12, 1982
Filed: Apr 16, 1980
Inventors
Leonard Rice
Marlin J. Freel
Gregory J. Paquin
Howard E. Burkett
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.