Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12181706 | Multi-core optical fiber and design method | Taiji SAKAMOTO, Kazuhide NAKAJIMA, Masaki Wada, Takashi Yamamoto | 2024-12-31 |
| 12174413 | Long period fiber grating and optical transmission system | Ryota IMADA, Yoko YAMASHITA, Takashi Matsui, Taiji SAKAMOTO, Nobutomo HANZAWA +3 more | 2024-12-24 |
| 11237322 | Optical fiber manufacturing method using relative bulk densities | Shinichi Arai, Harumi Inaba, Shigeto Matsumoto, Takeshi Yagi, Kyozo Tsujikawa +1 more | 2022-02-01 |
| 11196227 | Optical amplifier | Masaki Wada, Taiji SAKAMOTO, Takashi Yamamoto, Kazuhide NAKAJIMA, Takayoshi Mori | 2021-12-07 |
| 10782478 | Inter-mode loss difference compensator and optical amplifier | Masaki Wada, Taiji SAKAMOTO, Takayoshi Mori, Takashi Yamamoto, Kazuhide NAKAJIMA | 2020-09-22 |
| 7953309 | Optical fiber and production method thereof | Atsushi Mori, Masao Kato, Kouji Enbutsu, Kiyoshi Oikawa, Takashi Kurihara +3 more | 2011-05-31 |
| 7677059 | Tellurite optical fiber and production method thereof | Atsushi Mori, Masao Kato, Kouji Enbutsu, Kiyoshi Oikawa, Takashi Kurihara +3 more | 2010-03-16 |
| 7589888 | Optical amplifier having a constant gain profile | Hiroji Masuda, Makoto Shimizu | 2009-09-15 |
| 7538937 | Optical amplifier | Hiroji Masuda, Makoto Shimizu | 2009-05-26 |
| 7313306 | Fiber laser, spontaneous emission light source and optical fiber amplifier | Makoto Yamada, Tadashi Sakamoto, Atsushi Mori, Kouji Shikano, Makoto Shimizu | 2007-12-25 |
| 7042634 | Optical amplifier | Hiroji Masuda, Makoto Shimizu | 2006-05-09 |
| 6721092 | Thulium-doped fiber amplifier using pump light for improving conversion efficiency in a S-band | Hiroji Masuda, Tadashi Sakamoto, Makoto Shimizu, Yoshiki Nishida | 2004-04-13 |