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Patents > Inventor country : AH or FR & Patent agent: H. Bœttcher fils

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airplane (7) · stability (7) · safety (6) · propellers (6) · design (6) · construction (5) · motors (4) · frame (4) · military (3) · piloting (3) · automatic stability (3) · rescue (3) · marine (3) · parachutes (3)
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Showing below up to 28 results in range #1 to #28.

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