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Patents > Year granted: 1920 - 1929 & IPCs : IPC B64C1/00 or IPC B64C25/00

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Tech fields:
airplane (9) · stability (8) · frame (7) · fuselage (6) · chassis (6) · None (5) · design (3) · landing (3) · landing gear (3) · automatic stability (3) · construction (3) · metal (2) · undercarriage (2) · flying machines (2) · gyroscope (2)
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CPCs:
CPC B64C17/00 (8) · CPC B64C2700/6218 (6) · CPC B64C25/06 (6) · CPC B64F2700/6226 (5) · CPC B64C1/00 (5) · CPC B64C2001/0063 (4) · CPC B64C17/06 (3) · CPC B64C25/64 (2) · CPC B64C2700/6216 (2) · CPC B64C2001/0081 (2) · CPC B64C1/12 (2)
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Citations from after 1930:
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Showing below up to 31 results in range #1 to #31.

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