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Patents > Inventor country: US & Grant date: 1910 - 1919 & Number of figures: 21-30

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stability (20) · airplane (18) · frame (12) · None (8) · HTA (8) · design (6) · propulsion (6) · navigation (6) · rudder (5) · wings (5) · automatic stability (5) · propeller (4) · marine (4)
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None (8) · 1913781506 (2) · 25941D (2)
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