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Patents > National tech categories: FR 6.4 & Number of text pages: 2 & Number of figures: 9-11

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None (15) · Airplane (5) · ornithopter (5) · toy (4) · construction (3) · propulsion (3) · balloons (3) · design (3) · wings (2) · LTA (2) · frame (2) · Hybrid (2)
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