Drilldown: Patents

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Patents > National tech categories : DE 77 or USPC 244/99.11 & Number of text pages: 3

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LTA (16) · frame (6) · propulsion (6) · navigation (6) · balloon (5) · None (4) · car (4) · airship (3) · stability (3) · control (3) · wheels (2) · steering (2) · propeller (2) · kite (2) · wings (2) · dirigible (2) · design (2)
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