Granted Patent
Utility
US 4,800,290 · App. 07/123,321
Control circuitry
Inventor:
Robert A. Norcross, Jr.
Patented Case
View Patent ↗
Granted: Jan 24, 1989
Filed: Nov 18, 1987
Inventor
Robert A. Norcross, Jr.
Assignee (at issue)
Norcross Group (Holdings) Ltd.
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.