Drilldown: Patents

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Patents > National tech categories : FR 6.3 or USPC 244/100R & Number of claims: 4-6

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navigation (9) · LTA (8) · stability (7) · propulsion (7) · airplane (6) · landing (5) · wings (4) · wheels (3) · balloon (3) · dirigible (3) · lift (3)
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