- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 3/04 - Calling substations, e.g. by ringing the calling signal being supplied from the final selector
Patent holdings for IPC class H04M 3/04
Total number of patents in this class: 10
10-year publication summary
|
1
|
1
|
0
|
0
|
0
|
1
|
0
|
1
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Samsung Electronics Co., Ltd. | 153357 |
2 |
| Sorenson IP Holdings, LLC | 309 |
2 |
| Ericsson | 22261 |
1 |
| Verizon Patent And Licensing Inc. | 7481 |
1 |
| Globetouch, Inc. | 8 |
1 |
| Tencent Technology (Shenzhen) Company Limited | 15618 |
1 |
| Promptlink Communications, Inc. | 39 |
1 |
| Ankura Trust Company, LLC | 320 |
1 |
| Other owners | 0 |