Granted Patent
Utility
US 4,378,580 · App. 06/320,415
Conduction limit protection arrangement for power transistor switch
Inventor:
Frederick A. Stich
Patented Case
View Patent ↗
Granted: Mar 29, 1983
Filed: Nov 12, 1981
Inventor
Frederick A. Stich
Assignee (at issue)
Allis-Chalmers 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.