Granted Patent
Utility
US 4,309,735 · App. 06/089,301
Protective circuits for converter-supplied D.C. motor
Inventor:
Gary C. Morris
Patented Case
View Patent ↗
Granted: Jan 5, 1982
Filed: Oct 30, 1979
Inventor
Gary C. Morris
Assignee (at issue)
Harnischfeger Corporation
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.