- All sections
- H - Electricity
- H04B - Transmission
- H04B 3/23 - Reducing echo effects or singing; Opening or closing transmitting path; Conditioning 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: 458
10-year publication summary
|
43
|
34
|
35
|
42
|
45
|
24
|
25
|
19
|
17
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Marvell Asia PTE, Ltd. | 6841 |
26 |
| Cisco Technology, Inc. | 18858 |
18 |
| NEC Corporation | 32703 |
16 |
| Realtek Semiconductor Corp. | 3028 |
16 |
| Huawei Technologies Co., Ltd. | 100781 |
15 |
| Cavium International | 5549 |
15 |
| Yamaha Corporation | 4054 |
13 |
| Mitsubishi Electric Corporation | 43934 |
11 |
| Amazon Technologies, Inc. | 24422 |
11 |
| Apple Inc. | 50209 |
10 |
| Imagination Technologies Limited | 1458 |
9 |
| Qualcomm Incorporated | 76576 |
8 |
| Panasonic Corporation | 20786 |
8 |
| Mitel Networks Corporation | 455 |
8 |
| Intel Corporation | 45621 |
7 |
| Microsoft Technology Licensing, LLC | 51439 |
7 |
| Samsung Electronics Co., Ltd. | 131630 |
6 |
| Oki Electric Industry Co., Ltd. | 1652 |
6 |
| Avago Technologies International Sales Pte. Limited | 9260 |
6 |
| Nippon Telegraph and Telephone Corporation | 14195 |
5 |
| Other owners | 237 |