- 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: 602
10-year publication summary
|
40
|
38
|
29
|
41
|
30
|
19
|
9
|
18
|
11
|
11
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Huawei Technologies Co., Ltd. | 123867 |
76 |
| ZTE Corporation | 44230 |
67 |
| Siemens AG | 23996 |
23 |
| Mitsubishi Electric Corporation | 48146 |
17 |
| Ciena Corporation | 2190 |
17 |
| Telefonaktiebolaget LM Ericsson (publ) | 28859 |
17 |
| Cisco Technology, Inc. | 22547 |
14 |
| Hewlett Packard Enterprise Development LP | 11508 |
13 |
| Fujitsu Limited | 16860 |
12 |
| Nippon Telegraph and Telephone Corporation | 15934 |
12 |
| NEC Corporation | 37135 |
11 |
| Hirschmann Automation and Control GmbH | 121 |
10 |
| Ericsson | 22839 |
8 |
| Omron Corporation | 7380 |
8 |
| Sumitomo Electric Industries, Ltd. | 16412 |
6 |
| Denso Corporation | 25633 |
6 |
| Sumitomo Wiring Systems, Ltd. | 11084 |
6 |
| Futurewei Technologies, Inc. | 3787 |
6 |
| AutoNetworks Technologies, Ltd. | 7164 |
6 |
| Tesla, Inc. | 2011 |
6 |
| Other owners | 261 |