Granted Patent
Utility
US 6,448,735 · App. 09/842,998
Controller for a wound rotor slip ring induction machine
Inventors:
Kalyan P. Gokhale, Douglas Karraker, Samuli Heikkila
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Apr 26, 2001
Inventors
Kalyan P. Gokhale
Douglas Karraker
Samuli Heikkila
Assignees (at issue)
ABB Automation GmbH
ABB Industry Oy
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.