Granted Patent
Utility
US 6,559,997 · App. 09/247,809
Optical transmitter and optical transmitting apparatus using the same
Inventors:
Shigeru Tokita, Atsushi Hasegawa, Takahiro Hamagishi
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Feb 11, 1999
Inventors
Shigeru Tokita
Atsushi Hasegawa
Takahiro Hamagishi
Assignees (at issue)
HITACHI, LTD.
Hitachi Communication Systems, Inc.
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.