- All sections
- G - Physics
- G03B - Apparatus or arrangements for taking photographs or for projecting or viewing themapparatus or arrangements employing analogous techniques using waves other than optical wavesaccessories therefor
- G03B 27/28 - Edge-masking devices
Patent holdings for IPC class G03B 27/28
Total number of patents in this class: 4
10-year publication summary
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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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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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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Canon Inc. | 39888 |
1 |
| Carl Zeiss SMT GmbH | 2978 |
1 |
| Coretronic Corporation | 1280 |
1 |
| HRL Laboratories, LLC | 1600 |
1 |
| Other owners | 0 |