- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 3/537 - Arrangements for indicating the presence of a recorded message
Patent holdings for IPC class H04M 3/537
Total number of patents in this class: 140
10-year publication summary
|
20
|
26
|
18
|
15
|
6
|
17
|
9
|
2
|
7
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Microsoft Technology Licensing, LLC | 51439 |
17 |
| Zoom Video Communications, Inc. | 819 |
9 |
| Samsung Electronics Co., Ltd. | 131630 |
7 |
| Glide Talk Ltd. | 16 |
6 |
| British Telecommunications Public Limited Company | 2575 |
5 |
| Research In Motion Limited | 2283 |
4 |
| AT&T Intellectual Property I, L.P. | 9886 |
4 |
| WhatsApp LLC | 206 |
4 |
| AT&T Mobility II LLC | 1982 |
3 |
| Google LLC | 38759 |
3 |
| Hearsay Social, Inc. | 37 |
3 |
| International Business Machines Corporation | 60644 |
2 |
| Huawei Technologies Co., Ltd. | 100781 |
2 |
| BCE Inc. | 431 |
2 |
| BT Americas Inc. | 4 |
2 |
| Vonage America LLC | 170 |
2 |
| T-Mobile Innovations LLC | 3213 |
2 |
| Relay, Inc. | 85 |
2 |
| META Platforms, Inc. | 7514 |
2 |
| Apple Inc. | 50209 |
1 |
| Other owners | 58 |