Drilldown: Patents

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Patents > National tech categories : AT 77d or USPC 244/30 & Number of text pages: 4-50000000

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LTA (16) · propulsion (11) · navigation (9) · frame (8) · balloon (8) · car (6) · propeller (6) · safety (5) · airplane (4) · rudder (4) · stability (3) · flapping (3)
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