- All sections
- G - Physics
- G04B - Mechanically-driven clocks or watches; mechanical parts of clocks or watches in general; time-pieces using the position of the sun, moon, or stars
- G04B 19/21 - Drums
Patent holdings for IPC class G04B 19/21
Total number of patents in this class: 13
10-year publication summary
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1
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1
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0
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1
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1
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1
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2
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1
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2
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0
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| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Harry Winston SA | 817 |
4 |
| Montres Breguet S.A. | 349 |
4 |
| Seiko Epson Corporation | 18724 |
1 |
| Omega SA | 197 |
1 |
| Vaucher Manufacture Fleurier S.A. | 19 |
1 |
| Frederic Piguet S.A. | 6 |
1 |
| Marblia Ltd. | 4 |
1 |
| Other owners | 0 |