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Patents > Filing date: October 1908 & Number of diagram pages: 1-3 & Number of figures: 3-20

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Paul Frederik Degn (5) · None (4) · Adolphe-François-Joseph Doutre (3) · Jack Edmund Humphreys (2) · Rudolf Penkala (2) · Karl Ludwig Waldemar Geest (2) · Friedrich Berner (2) · Eduard Penkala (2)
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None (9) · Paul Frederik Degn (5) · Adolphe-François-Joseph Doutre (3) · Jack Edmund Humphreys (2) · Friedrich Berner (2) · Eduard Penkala (2) · Rudolf Penkala (2)
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airplane (15) · propulsion (10) · design (10) · propellers (9) · navigation (9) · frame (9) · Lift (8) · propeller (7) · LTA (7) · stability (6) · Wings (5) · control (4) · None (4) · Ascension (4) · airfoil (4)
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