- All sections
- H - Electricity
- H04B - Transmission
- H04B 3/20 - Reducing echo effects or singingOpening or closing transmitting pathConditioning for transmission in one direction or the other
Patent holdings for IPC class H04B 3/20
Total number of patents in this class: 456
10-year publication summary
|
29
|
31
|
18
|
9
|
16
|
11
|
9
|
9
|
5
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Cisco Technology, Inc. | 22278 |
17 |
| Amazon Technologies, Inc. | 27705 |
16 |
| Microsoft Technology Licensing, LLC | 54242 |
15 |
| Realtek Semiconductor Corp. | 3432 |
15 |
| Marvell Asia PTE, Ltd. | 6347 |
12 |
| Cavium International | 4765 |
12 |
| Samsung Electronics Co., Ltd. | 153845 |
10 |
| Huawei Technologies Co., Ltd. | 120098 |
10 |
| Avago Technologies International Sales Pte. Limited | 8613 |
10 |
| Spotify AB | 1001 |
9 |
| Cerence Inc. | 262 |
8 |
| Cerence Operating Company | 426 |
8 |
| Yamaha Corporation | 4069 |
7 |
| Dolby Laboratories Licensing Corporation | 4266 |
7 |
| Google LLC | 43789 |
7 |
| Apple Inc. | 58074 |
6 |
| MaxLinear, Inc. | 843 |
6 |
| BlackBerry Limited | 4997 |
5 |
| Magic Leap, Inc. | 3368 |
5 |
| Synaptics Incorporated | 1808 |
5 |
| Other owners | 266 |