- All sections
- G - Physics
- G04C - Electromechanical clocks or watches
- G04C 21/20 - Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm
Patent holdings for IPC class G04C 21/20
Total number of patents in this class: 2
10-year publication summary
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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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0
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0
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1
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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 | 86867 |
1 |
| Manufacture D'horlogerie Audemars Piguet SA | 73 |
1 |
| Other owners | 0 |