Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12352652 | Evaluation method and evaluation device for multi-core fiber | Nobutomo HANZAWA, Takashi Matsui, Kazuhide NAKAJIMA | 2025-07-08 |
| 12189178 | Optical fiber | Takashi Matsui, Kazuhide NAKAJIMA | 2025-01-07 |
| 12181707 | Multi-core optical fiber and design method | Takashi Matsui, Kazuhide NAKAJIMA, Taiji SAKAMOTO | 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 |
| 12085749 | Optical fiber evaluation device and optical fiber evaluation method | Nobutomo HANZAWA, Takashi Matsui, Kazuhide NAKAJIMA | 2024-09-10 |
| 11879803 | Optical fiber evaluation method and optical fiber evaluation apparatus | Tomokazu Oda, Hiroyuki OSHIDA, Daisuke IIDA, Atsushi Nakamura | 2024-01-23 |
| 11860405 | Hole assisted optical fiber | Saki NOZOE, Nobutomo HANZAWA, Kazuhide NAKAJIMA, Kyozo Tsujikawa | 2024-01-02 |
| 11815421 | Acoustic mode propagation speed measurement method and acoustic mode propagation speed measurement device | Takashi Matsui, Kyozo Tsujikawa, Kazuhide NAKAJIMA | 2023-11-14 |
| 11722223 | Optical communication system and optical communication method | Takashi Matsui, Taiji SAKAMOTO, Kazuhide NAKAJIMA | 2023-08-08 |
| 11366266 | Optical fiber and optical transmission system | Kazuhide NAKAJIMA, Takashi Matsui | 2022-06-21 |