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Patents > Office : CH or GR & Number of diagram pages: 2

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airplane (13) · frame (10) · propulsion (9) · Design (8) · propellers (8) · stability (7) · navigation (6) · LTA (5) · whole (5) · balloon (5) · wings (4) · wheels (3) · construction (3) · safety (3) · Lift (3)
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