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Patents > Year filed: 1915 & Inventor country : FR or HU & National tech categories : FR 6.4 or HU V/h or IT 8 or USPC 244/3.23

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Airplane (27) · propellers (10) · control (8) · construction (7) · design (7) · motors (6) · Steering (5) · Propulsion (5) · automatic stability (5) · stability (5) · subsystem (5) · helicopter (4) · fuselage (4) · None (4)
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None (10) · CPC B64C13/00 (5) · CPC B64D27/00 (3) · CPC B64C39/00 (3) · CPC B64C35/00 (3) · CPC B64C33/00 (2) · CPC B64C27/04 (2) · CPC B64C23/005 (2) · CPC B64C2700/6274 (2)
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Showing below up to 53 results in range #1 to #53.

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