Granted Patent
Utility
US 4,804,308 · App. 07/005,055
Wheelchair lift
Inventors:
Peter Collen Hamblin, George W. Schwarz, Jr.
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: Jan 20, 1987
Inventors
Peter Collen Hamblin
George W. Schwarz, Jr.
Assignee (at issue)
Motor Coach Industries Limited
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.