Patent for Verfahren und Vorrichtung insbesondere für Bühnenprojektion. Geyling, Planer & Schrapringer, 1930 (Q38419)
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Patent for method and device, in particular for stage projection.
- AT120161B
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Patent for Verfahren und Vorrichtung insbesondere für Bühnenprojektion. Geyling, Planer & Schrapringer, 1930
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Patent for method and device, in particular for stage projection.
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