- All sections
- H - Electricity
- H04B - Transmission
- H04B 10/291 - Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
Patent holdings for IPC class H04B 10/291
Total number of patents in this class: 412
10-year publication summary
|
20
|
23
|
23
|
27
|
33
|
35
|
53
|
51
|
39
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Telegraph and Telephone Corporation | 16416 |
75 |
| NEC Corporation | 34540 |
54 |
| Fujitsu Limited | 18417 |
23 |
| Huawei Technologies Co., Ltd. | 107154 |
16 |
| Accelink Technologies Co., Ltd. | 286 |
9 |
| Neptune Subsea IP Limited | 47 |
8 |
| Ciena Corporation | 1955 |
7 |
| Mitsubishi Electric Corporation | 44962 |
6 |
| Subcom, LLC | 134 |
6 |
| The Furukawa Electric Co., Ltd. | 3601 |
5 |
| Google LLC | 40989 |
5 |
| OFS Fitel, LLC | 555 |
5 |
| Lumeova, Inc. | 26 |
5 |
| AT&T Intellectual Property I, L.P. | 9347 |
4 |
| Cisco Technology, Inc. | 19411 |
4 |
| Institut National D'optique | 313 |
4 |
| X Development LLC | 1437 |
4 |
| Xieon Networks S.a.r.l. | 164 |
4 |
| Xtera Communications, Inc. | 30 |
4 |
| ADTRAN Networks SE | 183 |
4 |
| Other owners | 160 |