- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 1/253 - Telephone sets using digital voice transmission
Patent holdings for IPC class H04M 1/253
Total number of patents in this class: 432
10-year publication summary
|
38
|
51
|
39
|
35
|
18
|
22
|
15
|
5
|
7
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Microsoft Technology Licensing, LLC | 54215 |
36 |
| Xtone, Inc. | 27 |
22 |
| Agora Lab, Inc. | 87 |
13 |
| Skype | 133 |
10 |
| 8x8, Inc. | 458 |
10 |
| RingCentral, Inc. | 785 |
9 |
| AT&T Intellectual Property I, L.P. | 9831 |
8 |
| ZTE Corporation | 43576 |
8 |
| Google LLC | 43739 |
8 |
| Qwest Communications International Inc. | 123 |
8 |
| Sorenson IP Holdings, LLC | 309 |
8 |
| GN Netcom AS | 166 |
7 |
| Samsung Electronics Co., Ltd. | 153573 |
6 |
| Apple Inc. | 58049 |
6 |
| Cisco Technology, Inc. | 22256 |
6 |
| Hubbell Incorporated | 3405 |
6 |
| CenturyLink Intellectual Property LLC | 1276 |
6 |
| NT IP Holdings, LLC | 15 |
6 |
| Conversation Processing Intelligence Corp. | 15 |
6 |
| Netmomentum LLC | 41 |
6 |
| Other owners | 237 |