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Patents > IPCs : IPC B64C27/04 or IPC B64C33/00 & Number of text pages: 4-20

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Office:
Inventors:
None (2) · Richard A. Engler (2) · Alexis Beurrier (2) · Édouard-Jean Bigourdan (2)
Inventor country:
Applicant person:
None (3) · Richard A. Engler (2) · Alexis Beurrier (2) · Édouard-Jean Bigourdan (2)
Applicant type:
Applicant is inventor:
Tech fields:
helicopter (14) · Propulsion (11) · design (9) · ornithopter (9) · flapping (8) · wings (7) · Airplane (7) · stability (6) · hybrid (6) · frame (6) · HTA (5) · control (5) · Propellers (4) · propeller (4) · navigation (4) · None (4)
Full specification filed date:
Application number:
None (2)
Granted:
Related to aircraft:
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IPCs: (Click arrow to add another value)
First filing:
Citations from after 1930:
Number of text pages:
Number of diagram pages:

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