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Patents > Year granted: 1915 & Office : DE or HU or LU

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airplane (20) · frame (10) · Wings (8) · construction (6) · propellers (5) · subsystem (4) · propulsion (4) · LTA (4) · Flapping (4) · design (4) · None (4) · biplane (4) · lift (3) · airship (3)
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Showing below up to 48 results in range #1 to #48.

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