Granted Patent
Utility
US 4,965,509 · App. 07/310,806
Quasi-constant gate drive circuit
Inventor:
David J. Oldham
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: Feb 13, 1989
Inventor
David J. Oldham
Assignee (at issue)
Lutron Electronics Co., Inc.
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.