Granted Patent
Utility
US 5,590,237 · App. 07/713,367
Apparatus and method for controlling the rotation speed of electric motors
Inventor:
Gilles Audemard
Patented Case
View Patent ↗
Granted: Dec 31, 1996
Filed: Jun 12, 1991
Inventor
Gilles Audemard
Assignee (at issue)
Hospal AG
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.