Granted Patent
Utility
US 4,970,620 · App. 07/397,210
FET bridge protection circuit
Inventors:
Richard N. Lehnhoff, Robert J. Disser
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Aug 23, 1989
Inventors
Richard N. Lehnhoff
Robert J. Disser
Assignee (at issue)
General Motors 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.