Granted Patent
Utility
US 5,875,281 · App. 08/898,468
DC solid state series wound motor drive
Inventors:
Graham S. Thexton, John Aker
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Jul 24, 1997
Inventors
Graham S. Thexton
John Aker
Assignee (at issue)
Cableform, 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.