Drilldown: Patents

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Patents > National tech categories : DE 77h or FR 6.4 or USPC 244/22 or USPC 244/80 & Cites these patents : Patent AT-1909-47911 or USPC 244/26 or USPC 244/87 or None & Citations from after 1930: None & Number of text pages: 2 & Number of diagram pages: 2-3 & Number of figures: 6-8

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Design (7) · wings (6) · Airplane (6) · frame (5) · stability (4) · construction (4) · None (3) · propellers (3) · navigation (3) · dirigibles (3) · LTA (3) · subsystem (2) · Sustentation (2) · Airship (2) · Lift (2) · aerodynamics (2) · ornithopter (2)
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