Granted Patent
Utility
US 5,439,342 · App. 08/198,227
Safety barrier/ramp actuating mechanism for wheelchair lifts
Inventors:
John C. Hall, Lee B. Petersen, Jr.
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: Feb 18, 1994
Inventors
John C. Hall
Lee B. Petersen, Jr.
Assignee (at issue)
All American Transit Parts, 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.