- 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: 44
10-year publication summary
|
1
|
2
|
5
|
1
|
2
|
3
|
0
|
4
|
3
|
0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Huawei Technologies Co., Ltd. | 120661 |
5 |
| SELEX ES S.p.A. | 41 |
3 |
| West Technology Group, LLC | 407 |
3 |
| Cisco Technology, Inc. | 22347 |
2 |
| Optis Cellular Technology, LLC | 78 |
2 |
| UCL Business Ltd | 656 |
2 |
| Samsung Electronics Co., Ltd. | 154406 |
1 |
| Qualcomm Incorporated | 90545 |
1 |
| Sony Corporation | 30368 |
1 |
| NEC Corporation | 36702 |
1 |
| Ericsson | 22319 |
1 |
| Electronics and Telecommunications Research Institute | 9534 |
1 |
| NTT DoCoMo, Inc. | 14365 |
1 |
| Altera Corporation | 2467 |
1 |
| ADC Telecommunications, Inc. | 371 |
1 |
| ADC DSL Systems, Inc. | 15 |
1 |
| Realtek Semiconductor Corp. | 3441 |
1 |
| Acer Incorporated | 2153 |
1 |
| Datang Mobile Communications Equipment Co., Ltd | 4303 |
1 |
| Extreme Networks, Inc. | 730 |
1 |
| Other owners | 13 |