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Manufacturing method of an arc tube formed from a glass tube and having a spirally wound section within one plane |
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Arc tube formed from a glass tube and having a spirally wound section within one plane |
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Fluorescent lamp device |
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1991-01-08 |
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Fluorescent lamp and process for fabricating the same |
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High-pressure sodium lamp |
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1984-08-28 |
| 4423350 |
Fluorescent lamp and process for fabricating the same |
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| 4423353 |
High-pressure sodium lamp |
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1983-12-27 |
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High pressure sodium vapor discharge lamp |
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1982-02-16 |
