- All sections
- H - Electricity
- H04L - Transmission of digital information, e.g. telegraphic communication
- H04L 12/437 - Ring fault isolation or reconfiguration
Patent holdings for IPC class H04L 12/437
Total number of patents in this class: 600
10-year publication summary
|
40
|
38
|
29
|
41
|
30
|
19
|
9
|
18
|
11
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Huawei Technologies Co., Ltd. | 120661 |
76 |
| ZTE Corporation | 43659 |
66 |
| Siemens AG | 24189 |
23 |
| Mitsubishi Electric Corporation | 47655 |
18 |
| Ciena Corporation | 2155 |
17 |
| Telefonaktiebolaget LM Ericsson (publ) | 28655 |
17 |
| Cisco Technology, Inc. | 22347 |
14 |
| Hewlett Packard Enterprise Development LP | 10902 |
13 |
| Fujitsu Limited | 17007 |
12 |
| Nippon Telegraph and Telephone Corporation | 15961 |
12 |
| NEC Corporation | 36702 |
11 |
| Hirschmann Automation and Control GmbH | 125 |
10 |
| Ericsson | 22319 |
8 |
| Omron Corporation | 7331 |
8 |
| Sumitomo Electric Industries, Ltd. | 16126 |
6 |
| Sumitomo Wiring Systems, Ltd. | 10798 |
6 |
| Futurewei Technologies, Inc. | 3775 |
6 |
| AutoNetworks Technologies, Ltd. | 6951 |
6 |
| Tesla, Inc. | 1910 |
6 |
| Hitachi, Ltd. | 15918 |
5 |
| Other owners | 260 |