Granted Patent
Utility
US 6,367,947 · App. 09/502,365
Fluorescent lamp having excellent light distribution and high impact-resistance
Inventors:
Kenji Itaya, Takeshi Matsumura, Shiro Iida, Nobuharu Hata
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: Feb 18, 2000
Inventors
Kenji Itaya
Takeshi Matsumura
Shiro Iida
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.