Granted Patent
Utility
US 4,974,831 · App. 07/468,100
Exercise treadmill
Inventor:
Paul T. Dunham
Patented Case
View Patent ↗
Granted: Dec 4, 1990
Filed: Jan 10, 1990
Inventor
Paul T. Dunham
Assignee (at issue)
Precor Incorporated
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.