Granted Patent
Utility
US 6,533,306 · App. 09/765,022
Adjustable height anti-tip wheels for a power wheelchair
Inventor:
Walter Watkins
Patented Case
View Patent ↗
Granted: Mar 18, 2003
Filed: Jan 18, 2001
Inventor
Walter Watkins
Assignee (at issue)
Pride Mobility Products 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.