Patent for Perfectionnements apportés aux dispositifs servant à l'éclairage, Geyling, Planer, 1930 (Q38423)
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Patent for Improvements to lighting devices
- FR674233A
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Patent for Perfectionnements apportés aux dispositifs servant à l'éclairage, Geyling, Planer, 1930 | Patent for Improvements to lighting devices |
|
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author
Publication date
24 January 1930
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