- 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: 621
10-year publication summary
|
55
|
42
|
40
|
38
|
29
|
41
|
30
|
19
|
9
|
8
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Huawei Technologies Co., Ltd. | 100781 |
82 |
| ZTE Corporation | 39218 |
64 |
| Siemens AG | 24990 |
21 |
| Fujitsu Limited | 19265 |
17 |
| Mitsubishi Electric Corporation | 43934 |
17 |
| Ciena Corporation | 1927 |
17 |
| Telefonaktiebolaget LM Ericsson (publ) | 26435 |
17 |
| NEC Corporation | 32703 |
14 |
| Cisco Technology, Inc. | 18858 |
14 |
| Nippon Telegraph and Telephone Corporation | 14195 |
13 |
| Hewlett Packard Enterprise Development LP | 10702 |
13 |
| Hirschmann Automation and Control GmbH | 121 |
10 |
| Ericsson | 20417 |
9 |
| Omron Corporation | 6968 |
8 |
| Beckhoff Automation GmbH | 486 |
8 |
| Sumitomo Electric Industries, Ltd. | 14131 |
6 |
| Sumitomo Wiring Systems, Ltd. | 9367 |
6 |
| Futurewei Technologies, Inc. | 3708 |
6 |
| AutoNetworks Technologies, Ltd. | 5809 |
6 |
| Tesla, Inc. | 1519 |
6 |
| Other owners | 267 |