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Patents > IPCs: IPC B64C33/00 & Number of text pages: 3-5 & Number of figures: 5-14

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Franz Xaver Wels (2) · Julius Uherkovich de Uherkócz (2)
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flapping (18) · ornithopter (11) · propulsion (10) · wings (7) · stability (7) · frame (7) · airplane (6) · navigation (5) · hybrid (5) · design (4) · glider (4) · HTA (4) · None (3) · human-powered (3) · propeller (3) · lift (2) · ascension (2) · airfoil (2)
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