- All sections
- G - Physics
- G01J - Measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet lightcolorimetryradiation pyrometry
- G01J 1/28 - Photometry, e.g. photographic exposure meter by comparison with reference light or electric value intensity of the measured or reference value being varied to equalise their effects at the detector, e.g. by varying incidence angle using variation of intensity or distance of source
Patent holdings for IPC class G01J 1/28
Total number of patents in this class: 25
10-year publication summary
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2
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0
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0
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1
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0
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2
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0
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1
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2
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0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21338 |
3 |
| Church & Dwight Co., Inc. | 1775 |
1 |
| Hitachi, Ltd. | 16094 |
1 |
| Advantest Corporation | 1692 |
1 |
| Purdue Research Foundation | 3916 |
1 |
| Armageddon Energy, Inc. | 2 |
1 |
| Associated Universities, Inc. | 48 |
1 |
| Beijing University of Technology | 520 |
1 |
| Cambridge Enterprise Limited | 1246 |
1 |
| Commonwealth Scientific and Industrial Research Organisation | 1655 |
1 |
| Rensselaer Polytechnic Institute | 850 |
1 |
| SolFocus, Inc. | 31 |
1 |
| Trinamix GmbH | 428 |
1 |
| Argo AI, LLC | 213 |
1 |
| Sphere Ultrafast Photonics, SA | 8 |
1 |
| Guizhou Expressway Group Co., Ltd. | 5 |
1 |
| Mirae Energy Technology Co. | 3 |
1 |
| Polyplus Co., Ltd. | 2 |
1 |
| CLF Hitech Inc. | 2 |
1 |
| VIP 2 IVS | 1 |
1 |
| Other owners | 3 |