Granted Patent
Utility
US 6,423,142 · App. 09/377,464
Power supply control system
Inventor:
Daniel C. Hughey
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Aug 19, 1999
Inventor
Daniel C. Hughey
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.