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Patents > Year granted: 1910 - 1919 & Inventor country : Poland or RO

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airplane (18) · Design (14) · wings (13) · construction (13) · frame (12) · aerodynamics (11) · LTA (11) · propellers (10) · fuselage (7) · balloon (5) · gas (5) · stability (5) · landing (5) · airship (4) · control (4) · steering (4)
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