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Patents > Filing date: 1907 & National tech categories: BE K & Citations from after 1930: None

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Airplane (26) · LTA (10) · design (10) · propulsion (6) · sustentation (6) · rarefaction (5) · Propellers (5) · HTA (5) · hybrid (4) · Ascension (4) · frame (4) · wings (4) · stability (3) · steering (3) · control (3)
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