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Patents > Patent agent: Dupont et Elluin & National tech categories : FR 6.4 or GB 4 without buoyant

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Tech fields:
None (25) · airplane (11) · Construction (9) · frame (8) · Design (7) · stability (5) · propellers (5) · control (4) · aerodynamics (3) · landing (3) · fuselage (3) · wings (3)
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None (12)
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IPCs:
IPC B64C39/00 (6) · IPC B64D1/04 (5) · IPC B64C3/00 (5) · IPC B64C35/00 (4) · IPC B64B1/00 (4) · IPC B64D17/00 (4) · IPC B64C1/00 (4) · IPC B64C17/00 (3) · IPC F42C15/295 (3) · IPC B64C13/00 (2) · IPC B64C11/14 (2) · IPC B64C3/56 (2) · IPC B64C39/12 (2) · None (2)
CPCs:
CPC B64C3/00 (5) · CPC B64D1/04 (5) · CPC B64C35/00 (4) · CPC B64C39/00 (4) · CPC B64C17/00 (4) · CPC B64C1/00 (3) · CPC F42C15/295 (3) · CPC B64B1/00 (3) · CPC B64C2700/6295 (3) · CPC B64D17/00 (3) · CPC B64C2700/6235 (3) · CPC B64C3/56 (2) · CPC B64C39/12 (2) · CPC B64C2700/6233 (2) · CPC B64C2700/6214 (2) · CPC B64F2700/6261 (2) · CPC B64C33/02 (2) · CPC B64C13/00 (2) · CPC B64C11/14 (2)
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