- All sections
- H - Electricity
- H01J - Electric discharge tubes or discharge lamps
- H01J 61/20 - Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent mercury vapour
Patent holdings for IPC class H01J 61/20
Total number of patents in this class: 103
10-year publication summary
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5
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5
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4
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6
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8
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3
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2
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3
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3
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1
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| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Iwasaki Electric Co., Ltd. | 151 |
9 |
| Harison Toshiba Lighting Corp. | 48 |
6 |
| Panasonic Corporation | 20786 |
5 |
| OSRAM GmbH | 2442 |
5 |
| Heraeus Noblelight GmbH | 233 |
5 |
| General Electric Company | 18133 |
4 |
| Ceravision Limited | 49 |
4 |
| KLA-Tencor Corporation | 2574 |
4 |
| Trojan Technologies Inc. | 60 |
4 |
| Matsushita Electric Industrial Co., Ltd. | 4724 |
3 |
| Koninklijke Philips Electronics N.V. | 13133 |
3 |
| Umicore AG & Co. KG | 867 |
3 |
| Signify Holding B.V. | 6837 |
3 |
| Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | 166 |
2 |
| Light Sources, Inc. | 26 |
2 |
| Phoenix Electric Co., Ltd. | 43 |
2 |
| SAES Getters S.p.A. | 338 |
2 |
| Toshiba Lighting & Technology Corporation | 340 |
2 |
| Xylem IP Management S.a.r.l. | 37 |
2 |
| KLA Corporation | 1223 |
2 |
| Other owners | 31 |