Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12327979 | Optical semiconductor module | — | 2025-06-10 |
| 12322925 | Optical semiconductor module | — | 2025-06-03 |
| 11799267 | Optical module and manufacturing method of the same | Kosuke OKAWA, Tomoya Saeki, Hiroshi Hara | 2023-10-24 |
| 11595010 | Optical receiver and transimpedance amplifier circuit | Keiji Tanaka | 2023-02-28 |
| 11437962 | Differential amplifier circuit having variable gain | Keiji Tanaka | 2022-09-06 |
| 11362629 | Transimpedance amplifier circuit | Keiji Tanaka | 2022-06-14 |
| 10644653 | Amplifier and optical transmitter using the same | — | 2020-05-05 |
| 10608599 | Variable gain circuit and transimpedance amplifier using the same | Yoshiyuki Sugimoto | 2020-03-31 |
| 10574027 | Laser driver circuit and optical transmitter using the same | Keiji Tanaka | 2020-02-25 |
| 10396719 | Integrated circuit device | Taizo TATSUMI | 2019-08-27 |
| 10263583 | Variable gain amplifier | — | 2019-04-16 |
| 9825602 | Amplifier | Keiji Tanaka | 2017-11-21 |
| 9698023 | Traveling-wave amplifier | Taizo TATSUMI, Masataka Watanabe | 2017-07-04 |
| 9608581 | Differential amplifier | Taizo TATSUMI, Keiji Tanaka | 2017-03-28 |
| 9419574 | Amplifier circuit | Keiji Tanaka | 2016-08-16 |
| 9246440 | Differential amplifier | Keiji Tanaka, Taizo TATSUMI | 2016-01-26 |
| 9046703 | Optical modulator module and semiconductor optical modulator | Chie Fukuda, Naoya KONO, Morihiro Seki, Kazuhiro Yamaji, Yasuyuki Yamauchi +2 more | 2015-06-02 |
| 9030257 | Differential circuit compensated with self-heating effect of active device | Yoshiyuki Sugimoto, Makoto Ito, Keiji Tanaka | 2015-05-12 |
| 8957709 | Driver circuit powered by two power supplies sequentially activated | Keiji Tanaka | 2015-02-17 |