- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 1/20 - Arrangements for preventing acoustic feedback
Patent holdings for IPC class H04M 1/20
Total number of patents in this class: 52
10-year publication summary
|
5
|
4
|
5
|
1
|
5
|
7
|
2
|
0
|
1
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Qualcomm Incorporated | 76576 |
4 |
| Otter Products, LLC | 868 |
4 |
| Huawei Technologies Co., Ltd. | 100781 |
3 |
| Microsoft Technology Licensing, LLC | 51439 |
3 |
| Cirrus Logic, Inc. | 1719 |
3 |
| Imagination Technologies Limited | 1458 |
3 |
| Tyco Fire & Security GmbH | 2172 |
2 |
| AAC Technologies Pte. Ltd. | 1436 |
2 |
| Samsung Electronics Co., Ltd. | 131630 |
1 |
| Apple Inc. | 50209 |
1 |
| Research In Motion Limited | 2283 |
1 |
| Sony Ericsson Mobile Communications AB | 2014 |
1 |
| Hewlett-Packard Development Company, L.P. | 28538 |
1 |
| Ricoh Company, Ltd. | 13266 |
1 |
| Oracle International Corporation | 12313 |
1 |
| Skype | 136 |
1 |
| ZTE Corporation | 39218 |
1 |
| Motorola Solutions, Inc. | 4355 |
1 |
| Nokia Technologies Oy | 15057 |
1 |
| Cisco Systems International Sarl | 31 |
1 |
| Other owners | 16 |