Drilldown: Patents

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Patents > Office : DE or FR & National tech categories : DE 77 or FR 6.4 & IPCs : IPC B64B1/06 or IPC B64B1/40 or IPC B64C39/00 & Number of figures: 6

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Airplane (14) · Design (8) · stability (7) · wings (5) · lift (5) · propellers (5) · propulsion (4) · frame (4) · sustentation (4) · balloons (3) · construction (3) · Motors (3) · whole (3)
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