Drilldown: Patents

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Patents > Year filed: 1906 & National tech categories: FR 6.4 & Number of text pages: 1-2

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airplane (9) · LTA (9) · stability (6) · propulsion (6) · helicopter (6) · None (3) · aerodynamics (3) · construction (3) · Design (2) · lift (2) · hybrid (2) · heavier-than-air (2) · Frame (2) · equilibrium (2) · Dirigible (2) · Wings (2) · automatic stability (2) · ascension (2) · airfoil (2)
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