Granted Patent
Utility
US 6,693,393 · App. 10/221,167
Ballast for a discharge lamp
Inventors:
Hirofumi Konishi, Toshiaki Nakamura, Takashi Kambara, Miki Kotani, Toshifumi Tanaka
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Sep 18, 2002
Inventors
Hirofumi Konishi
Toshiaki Nakamura
Takashi Kambara
Miki Kotani
Toshifumi Tanaka
Assignee (at issue)
Matsushita Electric Works, Ltd.
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.