Granted Patent
Utility
US 6,461,279 · App. 09/912,664
Treadmill having dual treads for stepping exercises
Inventor:
Hai Pin Kuo
Patented Case
View Patent ↗
Granted: Oct 8, 2002
Filed: Jul 25, 2001
Inventor
Hai Pin Kuo
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.