Issued Patents All Time
Showing 1–25 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12309757 | Base station and radio communication system | — | 2025-05-20 |
| 12225334 | Radio relay system | — | 2025-02-11 |
| 11996624 | Antenna system and radio relay apparatus | — | 2024-05-28 |
| 11973573 | Communication relay apparatus, system, interference suppression method and program | Takafumi Fujii | 2024-04-30 |
| 11867821 | System, radio relay apparatus, information processing apparatus and method for specifying position of terminal apparatus | — | 2024-01-09 |
| 11784708 | Propagation path response estimation and interference canceling using spread-spectrum pilot signal in multi-feeder link of HAPS | Takafumi Fujii | 2023-10-10 |
| 11764861 | Interference canceling in HAPS multi-feeder link | Takafumi Fujii | 2023-09-19 |
| 11683084 | Reverse-link interference canceling in HAPS multi-feeder link | Takafumi Fujii | 2023-06-20 |
| 11652537 | Interference canceling by fixed division of feeder link transmission band in multiple gateway HAPS system | Takafumi Fujii | 2023-05-16 |
| 11637625 | Interference canceling by variable division of feeder link transmission band in multiple-gateway HAPS system | Takafumi Fujii | 2023-04-25 |
| 11133858 | Feeder link communication system of HAPS | Takafumi Fujii | 2021-09-28 |
| 11057858 | Base station, communication system and time synchronization method between base stations | Sho Nabatame, Mitsukuni Konishi, Atsushi Nagate | 2021-07-06 |
| 10945169 | Base station, mobile communication system and handover control method | Noboru Kanazawa, Daigo Ogata, Atsushi Nagate | 2021-03-09 |
| 10862614 | Base station apparatus | Daigo Ogata, Atsushi Nagate | 2020-12-08 |
| 10848982 | Communication terminal apparatus, satellite base station, base-station control apparatus and mobile communication system | — | 2020-11-24 |
| 10785738 | Communication system and small-cell base station | Shota Shiobara, Takao Okamawari | 2020-09-22 |
| 10707949 | Communication system, base station and communication control method | Shota Shiobara, Takao Okamawari | 2020-07-07 |
| 10659965 | Communication terminal apparatus, terrestrial cellular base station and mobile communication system | — | 2020-05-19 |
| 10321323 | Mobile communication system and radio resource control method | — | 2019-06-11 |
| 10149176 | Mobile communication system and base station control apparatus | Junichi Miyakawa | 2018-12-04 |
| 10104225 | Communication system and communication method | Liang Zhang, Takao Okamawari | 2018-10-16 |
| 9930555 | Method and system of measuring communication quality | Liang Zhang, Takao Okamawari | 2018-03-27 |
| 9826086 | Communication system and communication method | Liang Zhang, Takao Okamawari | 2017-11-21 |
| 9692531 | Method and system of measuring communication quality | Daisuke Maeda, Liang Zhang, Takao Okamawari | 2017-06-27 |
| 9668165 | Measuring communication quality via a mobile communication network | Liang Zhang, Takao Okamawari | 2017-05-30 |