Granted Patent
Utility
US 5,723,939 · App. 08/575,995
Circular fluorescent lamp
Inventors:
Ikuhiro Okuno, Toshiyoshi Oga, Hidehito Kawahara, Masashi Sangen
Patented Case
View Patent ↗
Granted: Mar 3, 1998
Filed: Dec 21, 1995
Inventors
Ikuhiro Okuno
Toshiyoshi Oga
Hidehito Kawahara
Masashi Sangen
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.