Granted Patent
Utility
US 6,558,019 · App. 10/075,307
Bulb-shaped fluorescent lamp
Inventors:
Shiro Iida, Takeshi Matsumura, Kenji Itaya, Nobuharu Hata
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Feb 15, 2002
Inventors
Shiro Iida
Takeshi Matsumura
Kenji Itaya
Nobuharu Hata
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.