- All sections
- H - Electricity
- H04L - Transmission of digital information, e.g. telegraphic communication
- H04L 12/42 - Loop networks
Patent holdings for IPC class H04L 12/42
Total number of patents in this class: 675
10-year publication summary
|
42
|
43
|
52
|
49
|
37
|
39
|
28
|
20
|
19
|
9
|
| 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 |
44 |
| Mitsubishi Electric Corporation | 48146 |
37 |
| ZTE Corporation | 44230 |
25 |
| Siemens AG | 23996 |
18 |
| Nippon Telegraph and Telephone Corporation | 15934 |
17 |
| Hewlett Packard Enterprise Development LP | 11508 |
14 |
| WAGO Verwaltungsgesellschaft mbH | 586 |
14 |
| Yazaki Corporation | 7132 |
12 |
| Ciena Corporation | 2190 |
11 |
| Cisco Technology, Inc. | 22547 |
9 |
| Omron Corporation | 7380 |
9 |
| Robert Bosch GmbH | 44238 |
8 |
| Ericsson | 22839 |
7 |
| Fujitsu Limited | 16860 |
7 |
| Futurewei Technologies, Inc. | 3787 |
7 |
| Qualcomm Incorporated | 92725 |
6 |
| NEC Corporation | 37135 |
6 |
| Panasonic Corporation | 18896 |
6 |
| Genesis Technical Systems Corp. | 16 |
6 |
| DeGirum Corporation | 21 |
6 |
| Other owners | 406 |