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Patents > Year granted: 1920 - 1929 & Assigned to: None & Number of claims: 9-13

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Year granted:
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Inventors:
Melville W. Mix (3) · None (2) · Vilmos Zurowec (2) · Richard A. Engler (2) · George Lanzius (2) · Spencer Heath (2) · Charles Arthur Wragg (2)
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Tech fields:
Airplane (11) · Design (10) · propellers (7) · frame (7) · wings (6) · fuselage (5) · subsystem (4) · propeller (4) · HTA (4) · None (4) · aerodynamics (4) · Biplane (4) · airfoil (3) · chassis (3) · construction (3) · lift (3) · stability (3) · landing (3) · military (3)
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CPCs:
None (5) · CPC B64C39/00 (3) · CPC B64C23/005 (3) · CPC B64C17/00 (2) · CPC B64C3/00 (2) · CPC B64C1/00 (2) · CPC B64C2700/6235 (2) · CPC B64C33/00 (2) · CPC B64C33/02 (2) · CPC B64C25/06 (2) · CPC B64C2001/0081 (2) · CPC B64C2001/0072 (2) · CPC B64F2700/6226 (2) · CPC Y02T50/433 (2) · CPC Y02T50/40 (2) · CPC B64C11/205 (2)
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Citations from after 1930:
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