- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 3/18 - Automatic or semi-automatic exchanges with means for reducing interferenceAutomatic or semi-automatic exchanges with means for reducing effects due to line faults
Patent holdings for IPC class H04M 3/18
Total number of patents in this class: 72
10-year publication summary
|
8
|
5
|
5
|
4
|
4
|
3
|
3
|
1
|
2
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Adtran, Inc. | 402 |
6 |
| ARRIS Enterprises LLC | 3402 |
6 |
| Samsung Electronics Co., Ltd. | 158442 |
4 |
| Ericsson | 22880 |
4 |
| Alcatel Lucent | 4308 |
4 |
| Huawei Technologies Co., Ltd. | 124115 |
3 |
| Enginuity Communications Corporation | 10 |
3 |
| Invoca, Inc. | 74 |
3 |
| Cisco Technology, Inc. | 22555 |
2 |
| Thomson Licensing | 3177 |
2 |
| Comet Capital, LLC | 4 |
2 |
| Dolby Laboratories Licensing Corporation | 4351 |
2 |
| Telefonaktiebolaget LM Ericsson (publ) | 28872 |
2 |
| Qualcomm Incorporated | 92859 |
1 |
| Illinois Tool Works Inc. | 11862 |
1 |
| Sony Corporation | 30111 |
1 |
| AT&T Intellectual Property I, L.P. | 10002 |
1 |
| Bank of America Corporation | 8472 |
1 |
| Alcatel Lucent SA | 1530 |
1 |
| Alcatel-Lucent USA Inc. | 522 |
1 |
| Other owners | 22 |