Granted Patent
Utility
US 6,003,891 · App. 08/747,359
Tilt wheelchair with center of gravity compensation
Inventor:
Douglas G. Broadhead
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Nov 12, 1996
Inventor
Douglas G. Broadhead
Assignee (at issue)
INVACARE CORPORATION
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.