Granted Patent
Utility
US 6,231,067 · App. 09/005,810
Motorized standing wheelchair
Inventors:
Jay A. Johnson, Paul T. Wade, Qinghuan Yu
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: Jan 12, 1998
Inventors
Jay A. Johnson
Paul T. Wade
Qinghuan Yu
Assignee (at issue)
FENA Design, 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.