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Patents > Office : DE or UN & CPCs : CPC B64B1/62 or CPC B64C3/385

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LTA (10) · gas (8) · frame (6) · airplane (6) · navigation (5) · None (4) · airfoil (4) · Tragfläche (3) · balloon (3) · lift (3) · control (3) · subsystem (2) · safety (2) · propulsion (2) · wings (2) · ascension (2) · dirigible (2) · ballonet (2)
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