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• 21:15, 13 February 2025 ChrisVG talk contribs created page Patent for Perfectionnements apportés aux dispositifs servant à l'éclairage, Geyling, Planer, 1930 (Q38423) (wbeditentity-create:2|en: Patent for Perfectionnements apportés aux dispositifs servant à l'éclairage, Geyling, Planer, 1930, Patent for Improvements to lighting devices)