Difference between revisions of "Patent for Perfectionnements apportés aux dispositifs servant à l'éclairage, Geyling, Planer, 1930 (Q38423)"
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(Created claim: Type of information (P11): source (Q98)) | (Created claim: Field (P19): lighting and projection (Q7)) | ||
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Revision as of 21:15, 13 February 2025
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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