- 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: 78
10-year publication summary
|
14
|
7
|
7
|
1
|
7
|
2
|
2
|
2
|
1
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Microsoft Technology Licensing, LLC | 53729 |
6 |
| Huawei Technologies Co., Ltd. | 112690 |
5 |
| RingCentral, Inc. | 764 |
5 |
| Telefonaktiebolaget LM Ericsson (publ) | 27967 |
4 |
| United Services Automobile Association (USAA) | 2996 |
3 |
| Wilmington Savings Fund Society, FSB | 377 |
3 |
| Alcatel Lucent | 4541 |
3 |
| British Telecommunications Public Limited Company | 2618 |
2 |
| T-Mobile USA, Inc. | 4106 |
2 |
| Virtualq GmbH | 2 |
2 |
| Alvaria Cayman (cx) | 305 |
2 |
| Arlington Technologies, LLC | 625 |
2 |
| Samsung Electronics Co., Ltd. | 146346 |
1 |
| Apple Inc. | 54937 |
1 |
| Qualcomm Incorporated | 85434 |
1 |
| AT&T Intellectual Property II, L.P. | 935 |
1 |
| AT&T Intellectual Property I, L.P. | 9515 |
1 |
| Nokia Corporation | 5632 |
1 |
| Ericsson | 21759 |
1 |
| Cisco Technology, Inc. | 19929 |
1 |
| Other owners | 31 |