- All sections
- H - Electricity
- H04Q - Selecting
- H04Q 1/45 - Signalling arrangementsManipulation of signalling currents using AC with voice-band signalling frequencies using multi-frequency signalling
Patent holdings for IPC class H04Q 1/45
Total number of patents in this class: 17
10-year publication summary
|
1
|
5
|
2
|
2
|
1
|
1
|
0
|
2
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Pindrop Security, Inc. | 282 |
7 |
| Mitsubishi Electric Corporation | 48236 |
1 |
| Nippon Telegraph and Telephone West Corporation | 14 |
1 |
| Nippon Telegraph And Telephone East Corporation | 24 |
1 |
| University of Florida Research Foundation, Inc. | 4196 |
1 |
| Cable Television Laboratories, Inc. | 1110 |
1 |
| Mitel Networks Corporation | 241 |
1 |
| Mitel Networks Corporation | 62 |
1 |
| NEC Platforms, Ltd. | 1067 |
1 |
| Wilmington Savings Fund Society, FSB | 340 |
1 |
| Alcatel Lucent | 4305 |
1 |
| Other owners | 0 |