Granted Patent
Utility
US 6,720,739 · App. 09/953,593
Ballast with protection circuit for quickly responding to electrical disturbances
Inventor:
John G. Konopka
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Sep 17, 2001
Inventor
John G. Konopka
Assignee (at issue)
OSRAM SYLVANIA 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.