Granted Patent
Utility
US 4,818,922 · App. 06/921,491
Optical commutation for permanent magnet motors
Inventors:
Jerome Sears, Walter Parfomak, Walter Kluss
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Oct 22, 1986
Inventors
Jerome Sears
Walter Parfomak
Walter Kluss
Assignee (at issue)
AlliedSignal, 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.