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Patents > Year filed: 1912 & Year granted: 1910 - 1919 & Inventor country: BE

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airplane (13) · stability (7) · wings (5) · frame (4) · design (3) · equilibrium (3) · construction (3) · lift (2) · hybrid (2) · propulsion (2) · electricity (2) · electronics (2) · battery (2)
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Showing below up to 21 results in range #1 to #21.

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