- 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: 787
10-year publication summary
|
96
|
69
|
66
|
54
|
48
|
44
|
47
|
38
|
32
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Microsoft Technology Licensing, LLC | 54220 |
57 |
| T-Mobile USA, Inc. | 4359 |
25 |
| TapText, LLC | 64 |
23 |
| Apple Inc. | 57505 |
22 |
| ZTE Corporation | 43468 |
21 |
| AT&T Intellectual Property I, L.P. | 9815 |
20 |
| AT&T Mobility II LLC | 1883 |
18 |
| Ultratec, Inc. | 85 |
16 |
| Verizon Patent And Licensing Inc. | 7431 |
15 |
| Google LLC | 43583 |
15 |
| Samsung Electronics Co., Ltd. | 152534 |
13 |
| Zoom Communications, Inc. | 1046 |
12 |
| British Telecommunications Public Limited Company | 2630 |
11 |
| 8x8, Inc. | 462 |
11 |
| BCE Inc. | 363 |
11 |
| Movius Interactive Corporation | 62 |
11 |
| International Business Machines Corporation | 62076 |
10 |
| Cisco Technology, Inc. | 22238 |
10 |
| Orange | 2008 |
10 |
| First Orion Corp. | 180 |
9 |
| Other owners | 447 |