Granted Patent
Utility
US 6,460,641 · App. 09/607,468
Mid-wheel drive wheelchair with front wheel multiple bias suspension and anti-tip assembly
Inventor:
Stephen L. Kral
Patented Case
View Patent ↗
Granted: Oct 8, 2002
Filed: Jun 29, 2000
Inventor
Stephen L. Kral
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.