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Patents > IPCs : IPC B64C27/04 or IPC B64C33/02 & Number of text pages: 4-20

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Office:
Inventors:
None (2) · Édouard-Jean Bigourdan (2) · Louis-Isidore Henry (2) · John Emery Harriman, Jr. (2) · James Dennis Roots (2) · Herbert Wiley Hetherington (2) · William Henry Kelly (2) · Alexis Beurrier (2)
Inventor country:
Applicant person:
None (4) · Édouard-Jean Bigourdan (2) · James Dennis Roots (2) · Herbert Wiley Hetherington (2) · Louis-Isidore Henry (2) · John Emery Harriman, Jr. (2) · Alexis Beurrier (2) · William Henry Kelly (2)
Applicant is inventor:
Tech fields:
helicopter (14) · Propulsion (12) · ornithopter (12) · flapping (12) · None (11) · design (10) · hybrid (9) · frame (9) · Airplane (8) · navigation (8) · control (6) · Propellers (6) · HTA (6) · wings (6) · heavier-than-air (5) · whole (5) · stability (5)
Full specification filed date:
Application number:
None (3)
Granted:
Related to aircraft:
Patent agent:
None (9) · Marks & Clerk (4) · Armengaud jeune (3) · None (3) · Brandon frères (2) · J. S. Withers & Spooner (2) · E. Blétry (2) · Browne & Co. (2) · Haseltine, Lake & Co. (2) · Ad. Sturm (2)
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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