- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 3/48 - Arrangements for recalling a calling subscriber when the wanted subscriber ceases to be busy
Patent holdings for IPC class H04M 3/48
Total number of patents in this class: 80
10-year publication summary
|
14
|
7
|
7
|
1
|
7
|
2
|
2
|
2
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Huawei Technologies Co., Ltd. | 108191 |
6 |
| Microsoft Technology Licensing, LLC | 53127 |
6 |
| RingCentral, Inc. | 750 |
5 |
| Telefonaktiebolaget LM Ericsson (publ) | 27520 |
4 |
| United Services Automobile Association (USAA) | 2866 |
3 |
| Wilmington Savings Fund Society, FSB | 376 |
3 |
| Alcatel Lucent | 4596 |
3 |
| British Telecommunications Public Limited Company | 2602 |
2 |
| T-Mobile USA, Inc. | 3951 |
2 |
| Virtualq GmbH | 2 |
2 |
| Alvaria Cayman (cx) | 308 |
2 |
| Arlington Technologies, LLC | 631 |
2 |
| Samsung Electronics Co., Ltd. | 140839 |
1 |
| Apple Inc. | 53393 |
1 |
| Qualcomm Incorporated | 82885 |
1 |
| AT&T Intellectual Property II, L.P. | 955 |
1 |
| AT&T Intellectual Property I, L.P. | 9390 |
1 |
| Nokia Corporation | 6039 |
1 |
| Ericsson | 21318 |
1 |
| Cisco Technology, Inc. | 19506 |
1 |
| Other owners | 32 |