Granted Patent
Utility
US 5,932,974 · App. 08/865,653
Ballast circuit with lamp removal protection and soft starting
Inventor:
Peter Wood
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: May 30, 1997
Inventor
Peter Wood
Assignee (at issue)
International Rectifier 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.