Issued Patents 2025
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12374851 | Optical amplification apparatus and optical amplification method | Hitoshi Takeshita, Keiichi Matsumoto | 2025-07-29 |
| 12375201 | Optical amplifier, optical amplifier controlling method, and optical transmission system | Keiichi Matsumoto, Hitoshi Takeshita, Hidemi Noguchi | 2025-07-29 |
| 12308599 | Optical amplifier, optical amplifier equalizing method, and transmission system | Keiichi Matsumoto, Shigeyuki Yanagimachi | 2025-05-20 |