Granted Patent
Utility
US 4,810,043 · App. 07/023,958
Tire-located track
Inventor:
Lawrie McIntosh
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Mar 11, 1987
Inventor
Lawrie McIntosh
Assignee (at issue)
Ontario Drive & Gear Limited
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.