Granted Patent
Utility
US 5,336,142 · App. 08/013,746
Stepper with adjustable resistance mechanism
Inventors:
William T. Dalebout, Richard B. Ellis
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Feb 4, 1993
Inventors
William T. Dalebout
Richard B. Ellis
Assignee (at issue)
Proform Fitness Products, 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.