Granted Patent
Utility
US 6,459,840 · App. 09/259,332
Optical transmission device
Inventors:
Hiroshi Sato, Masahiro Aoki, Tsurugi Sudoh, Akira Taike, Tomonobu Tsuchiya, Masaaki Komori, Kazuhisa Uomi
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: Mar 1, 1999
Inventors
Hiroshi Sato
Masahiro Aoki
Tsurugi Sudoh
Akira Taike
Tomonobu Tsuchiya
Masaaki Komori
Kazuhisa Uomi
Assignee (at issue)
HITACHI, 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.