- All sections
- H - Electricity
- H04B - Transmission
- H04B 10/071 - Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
Patent holdings for IPC class H04B 10/071
Total number of patents in this class: 827
10-year publication summary
|
54
|
74
|
64
|
72
|
77
|
88
|
87
|
102
|
74
|
20
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Huawei Technologies Co., Ltd. | 100781 |
89 |
| Nippon Telegraph and Telephone Corporation | 14195 |
39 |
| NEC Corporation | 32703 |
34 |
| ZTE Corporation | 39218 |
33 |
| Telefonaktiebolaget LM Ericsson (publ) | 26435 |
27 |
| Ciena Corporation | 1927 |
26 |
| Viavi Solutions Inc. | 1363 |
25 |
| Ericsson | 20417 |
21 |
| EXFO Inc. | 165 |
21 |
| Accelink Technologies Co., Ltd. | 264 |
17 |
| AT&T Intellectual Property II, L.P. | 1075 |
12 |
| NEC Laboratories America, Inc. | 995 |
10 |
| AFL Telecommunications LLC | 656 |
8 |
| Fluke Corporation | 921 |
8 |
| II-VI Delaware, Inc. | 1720 |
8 |
| AT&T Intellectual Property I, L.P. | 9886 |
7 |
| Cisco Technology, Inc. | 18858 |
7 |
| Adtran, Inc. | 443 |
7 |
| Taiwan Biophotonic Corporation | 18 |
7 |
| Ultra Communications, Inc. | 33 |
7 |
| Other owners | 414 |