- All sections
- G - Physics
- G11B - Information storage based on relative movement between record carrier and transducer
- G11B 7/139 - Numerical aperture control means
Patent holdings for IPC class G11B 7/139
Total number of patents in this class: 3
10-year publication summary
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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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1
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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
|
|---|---|---|
| Panasonic Intellectual Property Management Co., Ltd. | 32139 |
1 |
| Marvell World Trade Ltd. | 938 |
1 |
| Ceramic Data Solution GmbH | 12 |
1 |
| Other owners | 0 |