Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12316383 | Wavelength cross connect device, multiband transmission system, and multiband transmission method | Takeshi Seki, Sachio Suda, Kohei Saito | 2025-05-27 |
| 12244346 | Wavelength cross connect device and wavelength cross connect method | Takeshi Seki, Sachio Suda, Kohei Saito | 2025-03-04 |
| 12207030 | Optical node device, optical transport network system, optical path trace method and program | Takeshi Seki, Sachio Suda, Kohei Saito | 2025-01-21 |
| 11979226 | Wavelength cross connect device and wavelength cross connect method | Takeshi Seki, Sachio Suda, Kohei Saito, Kenta Hirose | 2024-05-07 |
| 11824583 | Cyclic wavelength band replacement device, multi-band transmission system, and cyclic wavelength band replacement method | Takeshi Seki, Sachio Suda, Kohei Saito, Kenta Hirose | 2023-11-21 |
| 11812205 | Optical cross-connect device, optical transmission system, and optical transmission line connection error detection method | Masatoshi Namiki, Masahiro Yokota, Hiroto TAKECHI, Katsuhiro Araya, Masaaki Inami +2 more | 2023-11-07 |
| 11750317 | Wavelength cross connect device and cross connect connection method | Takeshi Seki | 2023-09-05 |
| 11722235 | Optical branch insertion device and optical branch insertion method | Takeshi Seki | 2023-08-08 |
| 11696056 | Optical transmission system and optical transmission method | Hiroto TAKECHI, Katsuhiro Araya, Masatoshi Namiki, Takeshi Seki | 2023-07-04 |
| 11677489 | Wavelength cross connect device, branch ratio variable method, and program | Takeshi Seki | 2023-06-13 |
| 11528080 | Optical transmission system and failure diagnosis method for optical transmission system | Toshiyuki Oka, Takeshi Seki, Toshihiko Seki | 2022-12-13 |
| 11424824 | OSNR spectrum estimation apparatus, OSNR spectrum estimation method, and program | Kohei Saito, Takeshi Seki, Tsutomu Kubo | 2022-08-23 |
| 11379801 | Maintenance support system and maintenance support method | Yoshiyasu Fujiwara, Kazunori Oda, Yoshio Miyamae | 2022-07-05 |
| 11362894 | Wiring management system and wiring management method | Yoshihiko Uematsu, Hiroshi Yamamoto, Katsuhiro Araya, Toshiyuki Oka | 2022-06-14 |
| 11265628 | Optical transmission system and optical transmission method | Katsuhiro Araya, Yoshihiko Uematsu, Toshiyuki Oka, Hiroshi Yamamoto | 2022-03-01 |
| 11251877 | Optical reception device | Hiroshi Yamamoto, Katsuhiro Araya, Yoshihiko Uematsu, Toshiyuki Oka | 2022-02-15 |
| 10928004 | Threshold value calculation system, and threshold value calculation method | Yoshiyasu Fujiwara, Kazunori Oda, Yoshio Miyamae | 2021-02-23 |
| 10847035 | Demand responsive operation system | Norihiko Kobayashi | 2020-11-24 |
| 10353397 | Information management device, vehicle, and information management method | Satoshi Nakaya, Takashi Yoshida, Takenori Matsumoto | 2019-07-16 |
| 7868202 | Process for producing (meth)acrolein or (meth)acrylic acid | Shuhei Yada, Yukihiro Hasegawa | 2011-01-11 |