Drilldown: Patents

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Patents > Year filed: 1900 - 1909 & Inventor country: BE & IPCs : IPC B64C39/00 or None

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airplane (50) · LTA (36) · propellers (33) · hybrid (30) · propulsion (15) · design (10) · Rarefaction (6) · None (5) · aerodynamics (5) · helicopter (5) · ascension (4) · Control (4) · Steering (4) · dirigibles (4) · fuselage (4) · sail (3) · frame (3) · hull (3) · construction (3)
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Showing below up to 83 results in range #1 to #83.

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