Granted Patent
Utility
US 6,547,340 · App. 10/003,426
Low vibration omni-directional wheel
Inventor:
Donald Harris
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Dec 6, 2001
Inventor
Donald Harris
Assignee (at issue)
Airtrax, 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.