- All sections
- H - Electricity
- H04Q - Selecting
- H04Q 1/444 - Signalling arrangementsManipulation of signalling currents using AC with voice-band signalling frequencies
Patent holdings for IPC class H04Q 1/444
Total number of patents in this class: 2
10-year publication summary
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0
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0
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0
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1
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0
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0
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0
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0
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0
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0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Qualcomm Incorporated | 85914 |
1 |
| Nokia Technologies Oy | 18175 |
1 |
| Other owners | 0 |