- 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: 670
10-year publication summary
|
42
|
43
|
52
|
49
|
37
|
39
|
28
|
20
|
19
|
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 |
42 |
| Mitsubishi Electric Corporation | 48508 |
37 |
| ZTE Corporation | 44368 |
24 |
| Siemens AG | 23943 |
18 |
| Nippon Telegraph and Telephone Corporation | 15898 |
17 |
| Hewlett Packard Enterprise Development LP | 12492 |
14 |
| WAGO Verwaltungsgesellschaft mbH | 593 |
14 |
| Yazaki Corporation | 7184 |
12 |
| Ciena Corporation | 2213 |
11 |
| Robert Bosch GmbH | 44427 |
9 |
| Cisco Technology, Inc. | 22668 |
9 |
| Omron Corporation | 7438 |
9 |
| Ericsson | 23125 |
7 |
| Fujitsu Limited | 16814 |
7 |
| Futurewei Technologies, Inc. | 3790 |
7 |
| Qualcomm Incorporated | 93957 |
6 |
| NEC Corporation | 37563 |
6 |
| Panasonic Corporation | 18572 |
6 |
| Genesis Technical Systems Corp. | 16 |
6 |
| DeGirum Corporation | 21 |
6 |
| Other owners | 403 |