Granted Patent
Utility
US 4,876,491 · App. 07/163,222
Method and apparatus for brushless DC motor speed control
Inventors:
John P. Squires, Louis J. Shrinkle
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: Feb 26, 1988
Inventors
John P. Squires
Louis J. Shrinkle
Assignee (at issue)
Conner Peripherals, 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.