Granted Patent
Utility
US 5,135,447 · App. 07/669,815
Exercise apparatus for simulating stair climbing
Inventors:
Chester F. Robards, Jr., Steven J. Cinke, Stephen A. Waltasti, Robert Kohan, Donald J. Alexander, Douglas G. Guenther, David J. Thum, Tomas Leon
Patented Case
View Patent ↗
Granted: Aug 4, 1992
Filed: Mar 15, 1991
Inventors
Chester F. Robards, Jr.
Steven J. Cinke
Stephen A. Waltasti
Robert Kohan
Donald J. Alexander
Douglas G. Guenther
David J. Thum
Tomas Leon
Assignee (at issue)
Life Fitness, LLC
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.