- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 1/78 - Circuit arrangements in which low-frequency speech signals proceed in one direction on the line, while speech signals proceeding in the other direction on the line are modulated on a high-frequency carrier signal
Patent holdings for IPC class H04M 1/78
Total number of patents in this class: 57
10-year publication summary
|
0
|
0
|
0
|
1
|
1
|
22
|
6
|
15
|
7
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Shenzhen Shokz Co., Ltd. | 1106 |
54 |
| Samsung Electronics Co., Ltd. | 145630 |
1 |
| Nice Systems B.V. | 1 |
1 |
| Shenzhen Voxtech Co., Ltd. | 97 |
1 |
| Other owners | 0 |