Drilldown: Patents

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

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LTA (8) · stability (6) · airplane (6) · propulsion (6) · helicopter (5) · lift (3) · construction (3) · ascension (2) · Dirigible (2) · airfoil (2) · aeroplane (2) · heavier-than-air (2) · equilibrium (2) · automatic stability (2) · texture (2) · aerodynamics (2)
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