- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 3/20 - Automatic or semi-automatic exchanges with means for breaking-in on conversations
Patent holdings for IPC class H04M 3/20
Total number of patents in this class: 85
10-year publication summary
|
7
|
11
|
8
|
11
|
11
|
9
|
6
|
4
|
4
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Tevnos LLC | 14 |
8 |
| Comcast Cable Communications, LLC | 4075 |
5 |
| Callyo 2009 Corp. | 43 |
4 |
| Global Tel*Link Corporation | 431 |
4 |
| Sun Patent Trust | 1972 |
4 |
| BlackBerry Limited | 5958 |
3 |
| Research In Motion Limited | 2283 |
3 |
| AT&T Intellectual Property I, L.P. | 9886 |
3 |
| I.m.n.a. Solutions Ltd | 6 |
3 |
| Huawei Technologies Co., Ltd. | 100781 |
2 |
| ZTE Corporation | 39218 |
2 |
| Avaya Inc. | 1529 |
2 |
| Motorola Solutions, Inc. | 4355 |
2 |
| Value-Added Communications, Inc. | 20 |
2 |
| Wells Fargo Bank, National Association | 2945 |
2 |
| Securus Technologies, LLC | 292 |
2 |
| META Platforms, Inc. | 7514 |
2 |
| Qualcomm Incorporated | 76576 |
1 |
| International Business Machines Corporation | 60644 |
1 |
| Honeywell International Inc. | 13799 |
1 |
| Other owners | 29 |