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Patents > Office : CA or DE & Inventor country : FR or UA & Number of text pages: 3-70

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airplane (9) · propulsion (8) · LTA (7) · frame (7) · design (6) · stability (5) · balloon (4) · Navigation (4) · Safety (3) · motor (3) · aerodynamics (3) · wings (3) · airfoil (3) · construction (3)
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