Granted Patent
Utility
US 5,486,747 · App. 08/099,669
General purpose motor controller
Inventor:
David W. Welch
Patented Case
View Patent ↗
Granted: Jan 23, 1996
Filed: Jul 29, 1993
Inventor
David W. Welch
Assignee (at issue)
United Technologies Motor Systems, 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.