Granted Patent
Utility
US 5,225,742 · App. 07/805,597
Solid state ballast for high intensity discharge lamps
Inventor:
Denny D. Beasley
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: Dec 11, 1991
Inventor
Denny D. Beasley
Assignee (at issue)
Delta Coventry 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.