- 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: 897
10-year publication summary
|
74
|
64
|
72
|
77
|
88
|
90
|
106
|
76
|
57
|
33
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Huawei Technologies Co., Ltd. | 110995 |
103 |
| Nippon Telegraph and Telephone Corporation | 17157 |
43 |
| NEC Corporation | 35351 |
40 |
| ZTE Corporation | 42015 |
35 |
| Ciena Corporation | 2018 |
30 |
| Viavi Solutions Inc. | 1423 |
29 |
| Telefonaktiebolaget LM Ericsson (publ) | 27794 |
28 |
| EXFO Inc. | 161 |
23 |
| Ericsson | 21593 |
21 |
| Accelink Technologies Co., Ltd. | 295 |
17 |
| AT&T Intellectual Property II, L.P. | 936 |
10 |
| AFL Telecommunications LLC | 709 |
9 |
| II-VI Delaware, Inc. | 1689 |
9 |
| NEC Laboratories America, Inc. | 1146 |
9 |
| Fluke Corporation | 945 |
8 |
| AT&T Intellectual Property I, L.P. | 9470 |
7 |
| British Telecommunications Public Limited Company | 2608 |
7 |
| Cisco Technology, Inc. | 19623 |
7 |
| Adtran, Inc. | 427 |
7 |
| Taiwan Biophotonic Corporation | 18 |
7 |
| Other owners | 448 |