- All sections
- H - Electricity
- H04L - Transmission of digital information, e.g. telegraphic communication
- H04L 12/52 - Circuit switching systems, i.e. systems in which the path is physically permanent during the communication using time division techniques
Patent holdings for IPC class H04L 12/52
Total number of patents in this class: 43
10-year publication summary
|
1
|
2
|
5
|
1
|
2
|
3
|
0
|
4
|
3
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Huawei Technologies Co., Ltd. | 123385 |
5 |
| SELEX ES S.p.A. | 41 |
3 |
| West Technology Group, LLC | 408 |
3 |
| Optis Cellular Technology, LLC | 78 |
2 |
| UCL Business Ltd | 676 |
2 |
| Samsung Electronics Co., Ltd. | 157719 |
1 |
| Qualcomm Incorporated | 92196 |
1 |
| Sony Corporation | 30181 |
1 |
| NEC Corporation | 37004 |
1 |
| Ericsson | 22717 |
1 |
| Cisco Technology, Inc. | 22493 |
1 |
| Electronics and Telecommunications Research Institute | 9672 |
1 |
| NTT DoCoMo, Inc. | 14702 |
1 |
| Altera Corporation | 2474 |
1 |
| ADC Telecommunications, Inc. | 365 |
1 |
| ADC DSL Systems, Inc. | 14 |
1 |
| Realtek Semiconductor Corp. | 3503 |
1 |
| Acer Incorporated | 2182 |
1 |
| Datang Mobile Communications Equipment Co., Ltd | 4422 |
1 |
| Extreme Networks, Inc. | 717 |
1 |
| Other owners | 13 |