- 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: 73
10-year publication summary
|
7
|
7
|
1
|
7
|
2
|
3
|
2
|
1
|
1
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Huawei Technologies Co., Ltd. | 122474 |
5 |
| Microsoft Technology Licensing, LLC | 54399 |
4 |
| Telefonaktiebolaget LM Ericsson (publ) | 28724 |
4 |
| RingCentral, Inc. | 791 |
3 |
| United Services Automobile Association (USAA) | 3215 |
3 |
| Wilmington Savings Fund Society, FSB | 349 |
3 |
| Alcatel Lucent | 4339 |
3 |
| Samsung Electronics Co., Ltd. | 156823 |
2 |
| T-Mobile USA, Inc. | 4480 |
2 |
| Virtualq GmbH | 3 |
2 |
| Arlington Technologies, LLC | 595 |
2 |
| Apple Inc. | 58534 |
1 |
| Qualcomm Incorporated | 91550 |
1 |
| AT&T Intellectual Property II, L.P. | 827 |
1 |
| AT&T Intellectual Property I, L.P. | 9981 |
1 |
| Nokia Corporation | 4813 |
1 |
| Ericsson | 22518 |
1 |
| Cisco Technology, Inc. | 22452 |
1 |
| Verizon Patent And Licensing Inc. | 7546 |
1 |
| Skype | 130 |
1 |
| Other owners | 31 |