- 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: 598
10-year publication summary
|
40
|
38
|
29
|
41
|
30
|
19
|
9
|
18
|
11
|
13
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Huawei Technologies Co., Ltd. | 125590 |
72 |
| ZTE Corporation | 44368 |
67 |
| Siemens AG | 23943 |
24 |
| Mitsubishi Electric Corporation | 48508 |
17 |
| Ciena Corporation | 2213 |
17 |
| Telefonaktiebolaget LM Ericsson (publ) | 29015 |
17 |
| Cisco Technology, Inc. | 22668 |
15 |
| Hewlett Packard Enterprise Development LP | 12492 |
15 |
| Fujitsu Limited | 16814 |
12 |
| Nippon Telegraph and Telephone Corporation | 15898 |
12 |
| NEC Corporation | 37563 |
11 |
| Hirschmann Automation and Control GmbH | 124 |
10 |
| Ericsson | 23125 |
8 |
| Omron Corporation | 7438 |
8 |
| Sumitomo Electric Industries, Ltd. | 16419 |
6 |
| Denso Corporation | 25909 |
6 |
| Sumitomo Wiring Systems, Ltd. | 11259 |
6 |
| Futurewei Technologies, Inc. | 3790 |
6 |
| AutoNetworks Technologies, Ltd. | 7319 |
6 |
| Tesla, Inc. | 2067 |
6 |
| Other owners | 257 |