- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 3/533 - Voice mail systems
Patent holdings for IPC class H04M 3/533
Total number of patents in this class: 779
10-year publication summary
|
96
|
69
|
66
|
55
|
50
|
45
|
49
|
38
|
32
|
17
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Microsoft Technology Licensing, LLC | 54439 |
57 |
| T-Mobile USA, Inc. | 4491 |
28 |
| TapText, LLC | 73 |
23 |
| Apple Inc. | 58705 |
22 |
| ZTE Corporation | 44159 |
21 |
| AT&T Intellectual Property I, L.P. | 9993 |
20 |
| AT&T Mobility II LLC | 1898 |
18 |
| Verizon Patent And Licensing Inc. | 7555 |
15 |
| Google LLC | 44482 |
15 |
| Zoom Communications, Inc. | 1222 |
13 |
| 8x8, Inc. | 458 |
11 |
| BCE Inc. | 340 |
11 |
| Movius Interactive Corporation | 67 |
11 |
| Ultratec, Inc. | 80 |
11 |
| Samsung Electronics Co., Ltd. | 157557 |
10 |
| International Business Machines Corporation | 62621 |
10 |
| British Telecommunications Public Limited Company | 2600 |
10 |
| Cisco Technology, Inc. | 22491 |
10 |
| Orange | 2052 |
10 |
| First Orion Corp. | 183 |
9 |
| Other owners | 444 |