- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 3/428 - Arrangements for placing incoming calls on hold
Patent holdings for IPC class H04M 3/428
Total number of patents in this class: 292
10-year publication summary
|
41
|
34
|
26
|
28
|
24
|
26
|
23
|
18
|
18
|
10
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Avaya Inc. | 1529 |
18 |
| Google LLC | 38759 |
14 |
| FonCloud, Inc. | 33 |
13 |
| Apple Inc. | 50209 |
12 |
| T-Mobile USA, Inc. | 3668 |
10 |
| Arlington Technologies, LLC | 642 |
9 |
| Samsung Electronics Co., Ltd. | 131630 |
8 |
| Global Tel*Link Corporation | 431 |
8 |
| Qualcomm Incorporated | 76576 |
7 |
| Huawei Technologies Co., Ltd. | 100781 |
7 |
| Malikie Innovations Limited | 7703 |
7 |
| United Services Automobile Association (USAA) | 2514 |
6 |
| Verizon Patent And Licensing Inc. | 6900 |
5 |
| Microsoft Technology Licensing, LLC | 51439 |
5 |
| ZTE Corporation | 39218 |
4 |
| First Orion Corp. | 140 |
4 |
| NEC Platforms, Ltd. | 1106 |
4 |
| Alcatel Lucent | 4720 |
4 |
| Alvaria Cayman (cx) | 322 |
4 |
| BlackBerry Limited | 5958 |
3 |
| Other owners | 140 |