- 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: 601
10-year publication summary
|
38
|
37
|
29
|
39
|
29
|
19
|
9
|
18
|
11
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Huawei Technologies Co., Ltd. | 118145 |
78 |
| ZTE Corporation | 43386 |
66 |
| Siemens AG | 24278 |
22 |
| Mitsubishi Electric Corporation | 47352 |
18 |
| Ciena Corporation | 2088 |
17 |
| Telefonaktiebolaget LM Ericsson (publ) | 28541 |
17 |
| Cisco Technology, Inc. | 22218 |
14 |
| Nippon Telegraph and Telephone Corporation | 16265 |
14 |
| Hewlett Packard Enterprise Development LP | 10788 |
13 |
| Fujitsu Limited | 17357 |
12 |
| NEC Corporation | 36448 |
11 |
| Hirschmann Automation and Control GmbH | 126 |
10 |
| Ericsson | 22156 |
8 |
| Omron Corporation | 7332 |
8 |
| Sumitomo Electric Industries, Ltd. | 15967 |
6 |
| Sumitomo Wiring Systems, Ltd. | 10702 |
6 |
| Futurewei Technologies, Inc. | 3767 |
6 |
| AutoNetworks Technologies, Ltd. | 6868 |
6 |
| Beckhoff Automation GmbH | 542 |
6 |
| Tesla, Inc. | 1830 |
6 |
| Other owners | 257 |