- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 19/068 - Thermionic cathodes characterised by the material with compounds having metallic conductive properties, e.g. lanthanum boride, as an emissive material
Patent holdings for IPC class H01J 19/068
Total number of patents in this class: 3
10-year publication summary
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0
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1
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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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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
|
|---|---|---|
| International Business Machines Corporation | 61353 |
1 |
| Applied Physics Technologies, Inc. | 14 |
1 |
| Oregon Physics, LLC | 6 |
1 |
| Other owners | 0 |