- 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: 807
10-year publication summary
|
108
|
96
|
69
|
66
|
54
|
48
|
44
|
47
|
38
|
31
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Microsoft Technology Licensing, LLC | 54000 |
61 |
| T-Mobile USA, Inc. | 4178 |
25 |
| Apple Inc. | 55640 |
22 |
| TapText, LLC | 65 |
22 |
| AT&T Intellectual Property I, L.P. | 9599 |
21 |
| ZTE Corporation | 42789 |
21 |
| AT&T Mobility II LLC | 1862 |
18 |
| Ultratec, Inc. | 84 |
16 |
| Verizon Patent And Licensing Inc. | 7154 |
15 |
| Google LLC | 42673 |
15 |
| Samsung Electronics Co., Ltd. | 147983 |
13 |
| Cisco Technology, Inc. | 22033 |
12 |
| BCE Inc. | 395 |
12 |
| British Telecommunications Public Limited Company | 2646 |
11 |
| 8x8, Inc. | 445 |
11 |
| Movius Interactive Corporation | 56 |
11 |
| Zoom Communications, Inc. | 794 |
11 |
| International Business Machines Corporation | 61596 |
10 |
| Orange | 1956 |
10 |
| Research In Motion Limited | 2006 |
9 |
| Other owners | 461 |