Granted Patent
Utility
US 6,144,539 · App. 09/226,758
Arrangement for protecting low-voltage control circuitry from externally applied high voltages, and dimming ballast employing such an arrangement
Inventors:
John G. Konopka, Sameer Sodhi
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Jan 6, 1999
Inventors
John G. Konopka
Sameer Sodhi
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.