- 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: 382
10-year publication summary
|
25
|
20
|
23
|
23
|
27
|
32
|
33
|
53
|
48
|
13
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Telegraph and Telephone Corporation | 14195 |
64 |
| NEC Corporation | 32703 |
51 |
| Fujitsu Limited | 19265 |
20 |
| Huawei Technologies Co., Ltd. | 100781 |
15 |
| Accelink Technologies Co., Ltd. | 264 |
8 |
| Neptune Subsea IP Limited | 50 |
8 |
| Ciena Corporation | 1927 |
7 |
| Mitsubishi Electric Corporation | 43934 |
6 |
| Subcom, LLC | 131 |
6 |
| The Furukawa Electric Co., Ltd. | 3486 |
5 |
| Google LLC | 38759 |
5 |
| Lumeova, Inc. | 24 |
5 |
| Cisco Technology, Inc. | 18858 |
4 |
| Huawei Marine Networks Co., Ltd. | 41 |
4 |
| Institut National D'optique | 309 |
4 |
| OFS Fitel, LLC | 549 |
4 |
| X Development LLC | 1453 |
4 |
| Xieon Networks S.a.r.l. | 172 |
4 |
| Xtera Communications, Inc. | 30 |
4 |
| ADTRAN Networks SE | 181 |
4 |
| Other owners | 150 |