Granted Patent
Utility
US 4,990,002 · App. 07/242,901
Motor control circuit
Inventor:
Alan P. French
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Sep 12, 1988
Inventor
Alan P. French
Assignee (at issue)
Ametek, 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.