- 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: 71
10-year publication summary
|
10
|
8
|
5
|
5
|
4
|
4
|
3
|
3
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Adtran, Inc. | 434 |
6 |
| ARRIS Enterprises LLC | 3448 |
6 |
| Ericsson | 21234 |
4 |
| Alcatel Lucent | 4609 |
4 |
| Samsung Electronics Co., Ltd. | 139798 |
3 |
| Huawei Technologies Co., Ltd. | 107372 |
3 |
| Enginuity Communications Corporation | 12 |
3 |
| Invoca, Inc. | 66 |
3 |
| Thomson Licensing | 3772 |
2 |
| Comet Capital, LLC | 4 |
2 |
| Dolby Laboratories Licensing Corporation | 4075 |
2 |
| Telefonaktiebolaget LM Ericsson (publ) | 27463 |
2 |
| Research In Motion Limited | 2163 |
1 |
| Qualcomm Incorporated | 82379 |
1 |
| 3m Innovative Properties Company | 17985 |
1 |
| Illinois Tool Works Inc. | 11414 |
1 |
| Sony Corporation | 31511 |
1 |
| AT&T Intellectual Property I, L.P. | 9350 |
1 |
| Cisco Technology, Inc. | 19425 |
1 |
| Alcatel Lucent SA | 1621 |
1 |
| Other owners | 23 |