- All sections
- H - Electricity
- H04B - Transmission
- H04B 3/23 - Reducing echo effects or singingOpening or closing transmitting pathConditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
Patent holdings for IPC class H04B 3/23
Total number of patents in this class: 452
10-year publication summary
|
34
|
35
|
42
|
45
|
24
|
25
|
20
|
17
|
16
|
10
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Marvell Asia PTE, Ltd. | 6552 |
27 |
| Realtek Semiconductor Corp. | 3282 |
18 |
| Cisco Technology, Inc. | 19900 |
17 |
| Huawei Technologies Co., Ltd. | 112316 |
17 |
| NEC Corporation | 35619 |
15 |
| Cavium International | 5052 |
15 |
| Yamaha Corporation | 4085 |
13 |
| Mitsubishi Electric Corporation | 46037 |
11 |
| Amazon Technologies, Inc. | 26646 |
11 |
| Apple Inc. | 54773 |
10 |
| Qualcomm Incorporated | 85183 |
9 |
| Imagination Technologies Limited | 1654 |
9 |
| Panasonic Corporation | 20124 |
8 |
| Mitel Networks Corporation | 61 |
8 |
| Avago Technologies International Sales Pte. Limited | 8768 |
8 |
| Intel Corporation | 46962 |
7 |
| Microsoft Technology Licensing, LLC | 53693 |
6 |
| ARRIS Enterprises LLC | 3443 |
6 |
| Samsung Electronics Co., Ltd. | 145864 |
5 |
| Nippon Telegraph and Telephone Corporation | 17337 |
5 |
| Other owners | 227 |