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Patents > Supplementary to patent : Patent FR-1908-389993 or None & IPCs: IPC B64C27/04

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Office:
Inventors:
None (3) · Alexis Beurrier (2) · Désiré Sival (2) · Félix Monin (2) · Édouard-Jean Bigourdan (2)
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Applicant person:
None (3) · Alexis Beurrier (2) · Félix Monin (2) · Désiré Sival (2)
Applicant is inventor:
Tech fields:
helicopter (34) · propulsion (12) · None (11) · propellers (11) · hybrid (9) · airplane (8) · ascension (8) · heavier-than-air (5) · propeller (5) · stability (4) · whole (4) · design (4) · Lift (4) · HTA (4) · wheels (4) · steering (3) · landing (3) · frame (3)
Full specification filed date:
Application number:
None (2)
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Supplementary to patent: (Click arrow to add another value)
Related to aircraft:
IPCs: (Click arrow to add another value)
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Citations from after 1930:
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