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Patents > National tech categories : AT 77d or FR 6.3 & Family year: 1902 & Number of figures: 6-60

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propulsion (10) · navigation (8) · LTA (7) · aerostat (4) · Propellers (4) · Aerodynamics (3) · design (3) · construction (3) · safety (2) · car (2) · dirigible (2) · propeller (2) · balloon (2) · ascension (2) · lift (2)
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Showing below up to 19 results in range #1 to #19.

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