- 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: 453
10-year publication summary
|
34
|
35
|
42
|
45
|
24
|
24
|
20
|
17
|
16
|
9
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Marvell Asia PTE, Ltd. | 6533 |
27 |
| Realtek Semiconductor Corp. | 3301 |
18 |
| Cisco Technology, Inc. | 21965 |
17 |
| Huawei Technologies Co., Ltd. | 113491 |
17 |
| NEC Corporation | 35879 |
15 |
| Cavium International | 4996 |
15 |
| Yamaha Corporation | 4074 |
13 |
| Mitsubishi Electric Corporation | 46346 |
11 |
| Amazon Technologies, Inc. | 26867 |
11 |
| Apple Inc. | 55345 |
10 |
| Qualcomm Incorporated | 86153 |
9 |
| Imagination Technologies Limited | 1669 |
9 |
| Panasonic Corporation | 20059 |
8 |
| Mitel Networks Corporation | 61 |
8 |
| Avago Technologies International Sales Pte. Limited | 8721 |
8 |
| Intel Corporation | 47093 |
7 |
| Microsoft Technology Licensing, LLC | 53854 |
6 |
| ARRIS Enterprises LLC | 3468 |
6 |
| Samsung Electronics Co., Ltd. | 147334 |
5 |
| Nippon Telegraph and Telephone Corporation | 17367 |
5 |
| Other owners | 228 |