Granted Patent
Utility
US 5,132,595 · App. 07/541,609
Filment switch for a lamp ballast
Inventors:
Robert A. Kulka, Frederick P. Bauer
Patented Case
View Patent ↗
Granted: Jul 21, 1992
Filed: Jun 21, 1990
Inventors
Robert A. Kulka
Frederick P. Bauer
Assignee (at issue)
Magnetek Universal Mfg. Co.
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.