Granted Patent
Utility
US 4,455,520 · App. 06/268,281
Method and means for stable operation of a synchronous motor
Inventors:
Kenneth Ward, Ross D. Welburn
Patented Case
View Patent ↗
Granted: Jun 19, 1984
Filed: May 29, 1981
Inventors
Kenneth Ward
Ross D. Welburn
Assignee (at issue)
Compumotor Corporation
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.