Drilldown: Patents

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Patents > National tech categories: None & Number of text pages: 4-30 & Number of figures: 13

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None (9) · construction (6) · propulsion (6) · frame (6) · wings (4) · marine (3) · propeller (3) · hydroaeroplane (3) · Airplane (3) · helicopter (2) · material (2) · control (2) · passenger (2) · metal (2) · fuselage (2) · stability (2) · design (2) · whole (2)
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