Granted Patent
Utility
US 4,605,883 · App. 06/345,972
Motor speed control circuit
Inventor:
James B. Cockroft
Patented Case
View Patent ↗
Granted: Aug 12, 1986
Filed: Feb 5, 1982
Inventor
James B. Cockroft
Assignee (at issue)
Sunbeam Corporation 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.