Issued Patents All Time
Showing 1–25 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12372721 | Depolarizer and optical amplifier excitation apparatus | Hiroto Kawakami, Shoichiro Kuwahara | 2025-07-29 |
| 12362837 | Optical signal demodulator, control method and program | Shuto Yamamoto, Masanori Nakamura, Hiroki Taniguchi | 2025-07-15 |
| 12231173 | Symbol determination device and tap selection method | Hiroki Taniguchi, Masanori Nakamura, Shuto Yamamoto | 2025-02-18 |
| 12224889 | Adaptive equalization filter and method for updating filter coefficients | Etsushi Yamazaki, Seiji Okamoto, Masanori Nakamura, Kengo Horikoshi, Takeo SASAI | 2025-02-11 |
| 12184337 | Optical transmission system, control apparatus, optical transmission method and program | Shuto Yamamoto, Masanori Nakamura, Hiroki Taniguchi | 2024-12-31 |
| 11901953 | Optical transmission system and characteristic estimation method | Takeo SASAI, Masanori Nakamura, Asuka Matsushita | 2024-02-13 |
| 11870489 | S/N ratio estimation circuit, and adaptive filter circuit | Masanori Nakamura, Shuto Yamamoto, Asuka Matsushita, Fukutaro HAMAOKA | 2024-01-09 |
| 11855699 | Optical transmission system, optical transmitting apparatus and optical receiving apparatus | Shuto Yamamoto, Masanori Nakamura, Hiroki Taniguchi | 2023-12-26 |
| 11822161 | Bias voltage adjustment apparatus and IQ optical modulation system | Hiroto Kawakami, Shoichiro Kuwahara | 2023-11-21 |
| 11711198 | Synchronous detection apparatus, synchronous detection method, and program | Hiroto Kawakami, Shoichiro Kuwahara | 2023-07-25 |
| 11711151 | Optical transmission system and compensation method | Asuka Matsushita, Masanori Nakamura, Kengo Horikoshi, Shoichiro Kuwahara | 2023-07-25 |
| 11706065 | Symbol judgement apparatus and symbol judgement method | Hiroki Taniguchi, Masanori Nakamura, Shuto Yamamoto, Akira Masuda | 2023-07-18 |
| 11683093 | Wavelength dispersion compensation apparatus, optical receiving apparatus, wavelength dispersion compensation method and computer program | Masanori Nakamura, Seiji Okamoto, Kengo Horikoshi, Shuto Yamamoto, Takayuki Kobayashi +1 more | 2023-06-20 |
| 11671119 | Signal processing apparatus and signal processing method | Seiji Okamoto, Etsushi Yamazaki, Masanori Nakamura, Masahito Tomizawa | 2023-06-06 |
| 11581944 | Optical transmission system | Shuto Yamamoto, Seiji Okamoto, Akira Masuda, Hiroki Taniguchi | 2023-02-14 |
| 11463169 | Wavelength dispersion amount estimation apparatus | Kengo Horikoshi, Masanori Nakamura, Seiji Okamoto, Fukutaro HAMAOKA | 2022-10-04 |
| 11444699 | Optical transmission system, optical receiving apparatus and optical transmission method | Akira Masuda, Fukutaro HAMAOKA, Shuto Yamamoto, Seiji Okamoto, Kengo Horikoshi +2 more | 2022-09-13 |
| 11444694 | Optical transmission system | Shuto Yamamoto, Akira Masuda, Hiroki Taniguchi | 2022-09-13 |
| 11397363 | Automatic bias control circuit | Hiroto Kawakami, Shoichiro Kuwahara, Masanori Nakamura | 2022-07-26 |
| 11381317 | Optical receiving apparatus and waveform distortion compensation method | Seiji Okamoto, Masanori Nakamura | 2022-07-05 |
| 11349572 | Optical transmission system, optical transmitting apparatus, and optical receiving apparatus | Masanori Nakamura, Seiji Okamoto, Etsushi Yamazaki | 2022-05-31 |
| 11329764 | Error correction device, error correction method, and optical communication system | Fumiaki Nakagawa, Yasuharu Onuma, Katsuichi Oyama, Yasuyuki Endoh, Etsushi Yamazaki +1 more | 2022-05-10 |
| 11323238 | Frame synchronization apparatus, optical communication apparatus, and frame synchronization method | Mitsuteru YOSHIDA, Yasuyuki Endoh, Katsuichi Oyama, Masayuki Ikeda, Tsutomu Takeya +2 more | 2022-05-03 |
| 11316588 | Wavelength dispersion compensation apparatus, wavelength dispersion compensation method, and optical receiving apparatus | Kyo MINOGUCHI, Etsushi Yamazaki, Seiji Okamoto | 2022-04-26 |
| 11303359 | Communication system, optical transmitting apparatus, and optical receiving apparatus | Seiji Okamoto, Fukutaro HAMAOKA, Masanori Nakamura | 2022-04-12 |