Granted Patent
Utility
US 5,847,522 · App. 08/556,576
Locking devices and control circuitry for permanent magnet electric motors
Inventor:
Valentin Barba
Patented Case
View Patent ↗
Granted: Dec 8, 1998
Filed: Nov 13, 1995
Inventor
Valentin Barba
Assignee (at issue)
GEC-Marconi Aerospace 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.