- 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. | 125590 |
5 |
| SELEX ES S.p.A. | 41 |
3 |
| West Technology Group, LLC | 410 |
3 |
| Optis Cellular Technology, LLC | 76 |
2 |
| UCL Business Ltd | 682 |
2 |
| Samsung Electronics Co., Ltd. | 159755 |
1 |
| Qualcomm Incorporated | 93957 |
1 |
| Sony Corporation | 29876 |
1 |
| NEC Corporation | 37563 |
1 |
| Ericsson | 23125 |
1 |
| Cisco Technology, Inc. | 22668 |
1 |
| Electronics and Telecommunications Research Institute | 9718 |
1 |
| NTT DoCoMo, Inc. | 15137 |
1 |
| Altera Corporation | 2485 |
1 |
| ADC Telecommunications, Inc. | 360 |
1 |
| ADC DSL Systems, Inc. | 14 |
1 |
| Realtek Semiconductor Corp. | 3528 |
1 |
| Acer Incorporated | 2209 |
1 |
| Datang Mobile Communications Equipment Co., Ltd | 4532 |
1 |
| Extreme Networks, Inc. | 710 |
1 |
| Other owners | 13 |