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Patents > IPCs : IPC B64B1/58 or IPC B64C3/56 & Number of claims: 5-7

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LTA (13) · frame (4) · dirigible (4) · envelope (3) · airplane (3) · Texture (3) · balloons (3) · Design (3) · None (2) · rudder (2) · navigation (2) · Hybrid (2) · gas (2) · Fabric (2) · wings (2) · construction (2) · Dirigibles (2) · ballonet (2)
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