Drilldown: Patents

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Patents > National tech categories : DE 77 or USPC 244/93 & Number of text pages: 3

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LTA (18) · navigation (9) · None (8) · car (7) · propulsion (7) · frame (6) · stability (5) · balloon (5) · airship (5) · control (4) · dirigible (3) · airplane (3) · takeoff (2) · steering (2) · hybrid (2) · propeller (2) · wheels (2) · whole (2) · kite (2) · design (2)
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