Patent for a Beleuchtungseinrichtung für Bildwerfer, Ludwig Pani, 1931 (Q31922)

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Revision as of 17:48, 2 August 2023 by ChrisVG (talk | contribs) (‎Created claim: Property:P40: 10 November 1931)

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Patent for a Beleuchtungseinrichtung für Bildwerfer, Ludwig Pani, 1931
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