Granted Patent
Utility
US 5,821,648 · App. 08/814,660
Electrical machine drive system including an optical position transducer circuit and method of operating
Inventor:
Damian Allinson
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Mar 11, 1997
Inventor
Damian Allinson
Assignee (at issue)
Switched Reluctance Drives Limited
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.