Granted Patent
Utility
US 5,313,548 · App. 08/051,745
Direct current motor speed controller
Inventors:
Lawrence C. Arvidson, Robert S. Horeck
Patented Case
View Patent ↗
Granted: May 17, 1994
Filed: Apr 22, 1993
Inventors
Lawrence C. Arvidson
Robert S. Horeck
Assignee (at issue)
Hypro, LLC
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.