Granted Patent
Utility
US 4,820,935 · App. 07/152,643
Multiple function driver circuit
Inventor:
Walter S. Gontowski, Jr.
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Feb 5, 1988
Inventor
Walter S. Gontowski, Jr.
Assignee (at issue)
Cherry Semiconductor 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.