Granted Patent
Utility
US 4,454,458 · App. 06/326,631
Synchronous drive for brushless DC motor
Inventor:
Gary L. Holland
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Dec 2, 1981
Inventor
Gary L. Holland
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.