Granted Patent
Utility
US 5,994,839 · App. 08/937,945
High-pressure metal vapor discharge lamp
Inventors:
Takashi Yamamoto, Shiki Nakayama, Hiroshi Nohara, Yoshiharu Nishiura, Shigefumi Oda
Patented Case
View Patent ↗
Granted: Nov 30, 1999
Filed: Sep 25, 1997
Inventors
Takashi Yamamoto
Shiki Nakayama
Hiroshi Nohara
Yoshiharu Nishiura
Shigefumi Oda
Assignee (at issue)
Matsushita Electronics 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.