Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12273147 | Coherent optical reception device and coherent optical reception method | Ryo Igarashi, Masamichi Fujiwara | 2025-04-08 |
| 12231172 | Optical signal processing apparatus and optical signal processing method | Shin KANEKO, Kazuaki Honda, Junichi KANI, Hiroo Suzuki, Jun Terada | 2025-02-18 |
| 12206461 | Optical feeding system | Ryo Igarashi, Masamichi Fujiwara | 2025-01-21 |
| 12199664 | Light leakage confirmation method, light leakage confirmation apparatus and program | Ryo Igarashi, Masamichi Fujiwara | 2025-01-14 |
| 12191905 | Optical communication system and protection method for optical communication system | Shin KANEKO, Kazuaki Honda, Hiroo Suzuki, Junichi KANI, Yasunari Tanaka | 2025-01-07 |
| 12143157 | Branch ratio setting system, method for producing optical communication system and optical branch device | Ryo Igarashi, Masamichi Fujiwara | 2024-11-12 |
| 12119869 | Optical amplification estimation method, optical amplification estimation apparatus and computer program | Ryo Igarashi, Masamichi Fujiwara | 2024-10-15 |
| 12101124 | Transmission system, transmission method, and communication system | Shin KANEKO, Kazuaki Honda, Junichi KANI, Hiroo Suzuki | 2024-09-24 |
| 11921333 | Wavelength-selection type optical receiving apparatus | Takeshi Imai, Yumiko SENOO, Kota Asaka | 2024-03-05 |
| 11870497 | Optical receiving apparatus, optical transmission system, optical transmission method and computer program | Ryo Igarashi, Masamichi Fujiwara, Junichi KANI | 2024-01-09 |
| 11863211 | Optical communication system and optical communication method | Ryo Igarashi, Masamichi Fujiwara, Kazutaka Hara, Yasutaka Kimura, Atsuko KAWAKITA | 2024-01-02 |
| 11848701 | Optical space communication system and optical space communication method | Takeshi Imai, Kota Asaka | 2023-12-19 |
| 11652554 | Optical receiving apparatus, optical transmission system, optical transmission method and computer program | Ryo Igarashi, Masamichi Fujiwara, Junichi KANI | 2023-05-16 |
| 11621778 | Optical communication system and optical communication method | Masamichi Fujiwara, Ryo Igarashi | 2023-04-04 |
| 11506883 | Optical wavelength selecting filter-module and optical wavelength selecting method | Takeshi Imai, Yumiko SENOO, Kota Asaka | 2022-11-22 |
| 11451305 | Optical receiving apparatus, optical transmitting apparatus, and frequency offset estimation method | Ryo Igarashi, Masamichi Fujiwara | 2022-09-20 |
| 11258510 | Tunable optical filter control apparatus and tunable optical filter control method | Takeshi Imai, Kota Asaka | 2022-02-22 |