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Patents > Citations from after 1930: 3-6 & Number of text pages: 2 & Number of claims: 4-90

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Applicant person:
Spencer Heath (2)
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Tech fields:
propeller (8) · None (6) · frame (5) · projectile (3) · airfoil (3) · airplane (3) · military (3) · fuselage (2) · kite (2) · propulsion (2) · wheels (2) · rudder (2) · takeoff (2)
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CPCs:
CPC F42B10/30 (3) · CPC B64C2700/6295 (2) · CPC Y02E10/74 (2) · CPC B63H1/26 (2) · CPC B64C2001/0081 (2) · CPC F03D3/00 (2) · CPC B64C39/08 (2) · CPC B64C11/006 (2)
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Citations from after 1930:
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