Granted Patent
Utility
US 6,008,615 · App. 09/210,310
Commutation controller
Inventor:
David Mark Sugden
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Dec 11, 1998
Inventor
David Mark Sugden
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.