Granted Patent
Utility
US 6,416,443 · App. 09/468,966
Exercise treadmill expansion control system
Inventors:
Ricky T. K. Choy, Stan Huang
Patented Case
View Patent ↗
Granted: Jul 9, 2002
Filed: Dec 21, 1999
Inventors
Ricky T. K. Choy
Stan Huang
Assignee (at issue)
Unisen, 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.