Granted Patent
Utility
US 6,478,720 · App. 09/519,676
Treadmill motor cooling system
Inventor:
Paul D. Barker
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Mar 6, 2000
Inventor
Paul D. Barker
Assignee (at issue)
ILLINOIS TOOL WORKS 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.