Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6496552 | Timing circuit | Hiroshi Hamano | 2002-12-17 |
| 6483636 | Optical amplifier | Yasushi Sugaya, Rikiya Watanabe | 2002-11-19 |
| 6411429 | Optical amplifying apparatus, wide-band optical amplifying apparatus, and optical communication system | Motoyoshi Sekiya, Takeshi Sakamoto, Makoto Murakami, Chihiro Ohshima, Yoshihito Onoda | 2002-06-25 |
| 6348987 | Multiplex optical communication system | — | 2002-02-19 |
| 5991477 | Optical transmission system, optical multiplexing transmission system, and related peripheral techniques | George Ishikawa, Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya | 1999-11-23 |
| 5909297 | Drift compensating circuit for optical modulators in an optical system | George Ishikawa, Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya | 1999-06-01 |
| 5896217 | Optical transmission system, optical multiplexing transmission system, and related peripheral techniques | George Ishikawa, Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya | 1999-04-20 |
| 5870213 | Optical transmission system, optical multiplexing transmission system, and related peripheral techniques | George Ishikawa, Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya | 1999-02-09 |
| 5815294 | Optical transmission system with transmission characteristic measuring device | George Ishikawa, Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya | 1998-09-29 |
| 5805322 | Multiplex optical communication system | — | 1998-09-08 |
| 5760937 | Optical demultiplexer | George Ishikawa, Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya | 1998-06-02 |
| 5754322 | Optical transmission system, optical multiplexing transmission system, and related peripheral techniques | George Ishikawa, Hiroshi Nishimoto, Hiroki Ooi, Motoyoshi Sekiya | 1998-05-19 |
| 5383046 | Supervisory and control signal transmitting system for use in optically amplifying repeaters system | Akihiko Sugata, Hiroshi Nishimoto | 1995-01-17 |