- All sections
- H - Electricity
- H04M - Telephonic communication
- H04M 1/50 - Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
Patent holdings for IPC class H04M 1/50
Total number of patents in this class: 23
10-year publication summary
|
2
|
1
|
2
|
1
|
0
|
0
|
0
|
2
|
0
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Research In Motion Limited | 1384 |
3 |
| Lisnr, Inc. | 42 |
3 |
| BlackBerry Limited | 4930 |
2 |
| LG Electronics Inc. | 75274 |
2 |
| Qualcomm Incorporated | 90870 |
1 |
| Cisco Technology, Inc. | 22386 |
1 |
| Marvell International Ltd. | 1125 |
1 |
| ZTE Corporation | 43749 |
1 |
| Microsoft Technology Licensing, LLC | 54289 |
1 |
| Keefe Commissary Network, L.L.C. | 6 |
1 |
| Sanechips Technology Co., Ltd. | 1268 |
1 |
| Zoom Video Communications, Inc. | 530 |
1 |
| BlackBerry Limited | 256 |
1 |
| Marvell Asia PTE, Ltd. | 6340 |
1 |
| Cavium International | 4737 |
1 |
| Sycurio Limited | 26 |
1 |
| Zoom Communications, Inc. | 1152 |
1 |
| Other owners | 0 |