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Patents > Year granted: 1920 & Number of text pages: 4-11 & Number of figures: 5-14

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Airplane (14) · None (7) · propulsion (5) · design (4) · stability (4) · navigation (4) · LTA (3) · control (3) · construction (3) · chassis (3) · motors (3) · frame (3) · propellers (3)
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None (5) · CPC B64C13/12 (4) · CPC B64C17/00 (4) · CPC B64C33/02 (2) · CPC B64C2700/6274 (2) · CPC B64C23/005 (2)
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