Granted Patent
Utility
US 5,423,563 · App. 08/266,430
Wheelchair having apparatus for climbing stairs
Inventor:
Franklin J. Wild
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: Jun 27, 1994
Inventor
Franklin J. Wild
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.