Granted Patent
Utility
US 4,638,197 · App. 06/781,409
Magnetic flux shield and enhancer for brushless motors
Inventor:
Memorial Kalagidis
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Sep 27, 1985
Inventor
Memorial Kalagidis
Assignee (at issue)
Ametek, 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.