Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12267112 | Communication apparatus, communication system, communication method, and non-transitory computer readable medium | — | 2025-04-01 |
| 11621783 | Optical receiver and receiving method | — | 2023-04-04 |
| 11073706 | Transmitter and bias adjustment method | — | 2021-07-27 |
| 10924190 | Optical receiver and optical reception method | — | 2021-02-16 |
| 10355786 | Optical modulator, optical transmitter, and optical modulation method | — | 2019-07-16 |
| 9654228 | Signal reception processing apparatus and method for processing received signal | — | 2017-05-16 |
| 7991299 | Optical transmitter with driving voltage control and method | Morihiko Ota | 2011-08-02 |
| 7860409 | Optical receiver, optical receiving apparatus using the optical receiver and optical receiving method thereof | Masaki Sato, Morihiko Ota | 2010-12-28 |
| 7212748 | Frequency detection circuit, optical receiver and optical transmission system using the same | — | 2007-05-01 |
| 6369922 | Wavelength division multiplex optical transmission apparatus | — | 2002-04-09 |
| 6043922 | Optical receiver board, optical wavelength-tuning filter module used for optical receiver board, and actuator for optical wavelength-tuning filter module | Takaaki Ogata, Hitoshi Oguri, Takashi Nakamura | 2000-03-28 |
| 5995254 | Wavelength division multiplexing light transmitting system | Yasuhiro Aoki | 1999-11-30 |
| 5912754 | Method for transmitting WDM optical signal to be amplified by optical amplification repeaters and systems used in same | Yasuhiro Aoki | 1999-06-15 |
| 4414196 | Method of producing single crystalline, acicular .alpha.-ferric oxide | Seiji Matsumoto, Kiyoshi Fukai, Hideji Yamamoto | 1983-11-08 |
| 4202871 | Production of acicular ferric oxide | Seiji Matsumoto, Kiyoshi Fukai, Shinya Nakatani | 1980-05-13 |