File:Savonius rotor shapes.png

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English: Part of drawing sheet of Sigurd Savonius' Austrian patent of 1925. The cross sections shown in Fig. 2 to 5 are denoted as embodiments of the object of the invention.
Deutsch: Ausschnitt des Zeichnungsblattes aus der Patentschrift Sigurd Savonius', Österreich 1925, Zitat: „Die Fig. 2–5 veranschaulichen schematisch im Querschnitt vier Ausführungsformen des Erfindungsgegenstandes;“
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Source AT000000103819B
Author Sigurd Savonius
Other versions Savonius patent drawing sheet.png

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