Granted Patent
Utility
US 5,650,709 · App. 08/415,236
Variable speed AC motor drive for treadmill
Inventors:
John T. Rotunda, Lester A. Hass, Victor Pipinich
Patented Case
View Patent ↗
Granted: Jul 22, 1997
Filed: Mar 31, 1995
Inventors
John T. Rotunda
Lester A. Hass
Victor Pipinich
Assignee (at issue)
QuinTron Instrument Company, 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.