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Patents > Patent agent: Herbert Haddan & Co. & Number of diagram pages: 1-2 & Number of figures: 3-4

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airplane (5) · control (5) · Frame (4) · construction (4) · design (4) · propellers (3) · stability (3) · wings (2) · mounting (2) · landing (2) · steering (2) · gyroscope (2) · ornithopter (2) · structure (2) · takeoff (2) · automatic stability (2) · assembly (2) · Whole (2) · navigation (2)
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