Drilldown: Patents

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Patents > Publication date: 1900 - 1999 & National tech categories: AU 90.3 & Citations from after 1930: None

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airplane (18) · frame (18) · whole (11) · stability (8) · propulsion (8) · heavier-than-air (6) · propeller (6) · piloting (5) · design (5) · helicopter (5) · marine (4) · safety (4) · landing (4) · hybrid (4) · navigation (3) · airfoil (3) · wings (3)
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