Granted Patent
Utility
US 4,999,556 · App. 07/485,940
Pulse width modulator motor control
Inventor:
Stephen C. Masters
Patented Case
View Patent ↗
Granted: Mar 12, 1991
Filed: Feb 27, 1990
Inventor
Stephen C. Masters
Assignee (at issue)
Scott Motors, 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.