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Patents > Filing date: 1917 & National tech categories : FR 6.2 or FR 6.4 & Number of text pages: 1-2

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Tech fields:
airplane (16) · Design (13) · frame (7) · None (6) · aerodynamics (5) · Wings (5) · Fuselage (5) · Hydroaeroplane (5) · construction (4) · monoplane (4) · control (4) · military (3) · longerons (3) · Motors (3) · propulsion (3)
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CPC B64C3/00 (9) · CPC B64C3/18 (4) · CPC B64C35/00 (3) · CPC B64C2700/6233 (3) · CPC B64C2700/6235 (3) · CPC B64C2001/0063 (3) · CPC B64D33/10 (2) · CPC B64C25/36 (2) · CPC B64C25/06 (2) · CPC B64D2700/62692 (2) · CPC B64C1/06 (2) · CPC B64C13/00 (2) · CPC B64F2700/6226 (2) · CPC B64C11/00 (2) · CPC B64C23/005 (2)
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