Patent FR-1901-312997

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Year filed
Year granted 1901
Office FR
Patent number 312997
Inventors GRASSL
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Applicant is inventor? 1
Original title Appareil de navigation aérienne avec ailes à hélices à double action et ailes de direction rotative sur l'axe central
English title Navigable aircraft with directed wings and double-action propellers on a central axis
Tech fields airplane
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Grant date 1901-07-26
Granted? 1
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Supplementary to patent
Related to aircraft? Yes
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Family year 1901
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Cites these patents
Citations from after 1930
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