- All sections
- H - Electricity
- H04B - Transmission
- H04B 10/071 - Arrangements for monitoring or testing transmission systemsArrangements 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: 977
10-year publication summary
|
64
|
72
|
77
|
88
|
90
|
106
|
81
|
60
|
71
|
40
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Huawei Technologies Co., Ltd. | 123282 |
118 |
| NEC Corporation | 36934 |
47 |
| Nippon Telegraph and Telephone Corporation | 15922 |
44 |
| ZTE Corporation | 44159 |
35 |
| Ciena Corporation | 2173 |
33 |
| Viavi Solutions Inc. | 1533 |
32 |
| Telefonaktiebolaget LM Ericsson (publ) | 28744 |
28 |
| EXFO Inc. | 164 |
27 |
| Ericsson | 22660 |
22 |
| Accelink Technologies Co., Ltd. | 332 |
18 |
| British Telecommunications Public Limited Company | 2600 |
12 |
| Subcom, LLC | 155 |
11 |
| AT&T Intellectual Property II, L.P. | 820 |
10 |
| II-VI Delaware, Inc. | 1624 |
10 |
| AFL Telecommunications LLC | 765 |
9 |
| ADTRAN Networks SE | 191 |
9 |
| AT&T Intellectual Property I, L.P. | 9993 |
8 |
| Mitsubishi Electric Corporation | 47971 |
8 |
| Fluke Corporation | 1000 |
8 |
| NEC Laboratories America, Inc. | 1253 |
8 |
| Other owners | 480 |