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Patents > IPCs: IPC B64B1/62 & Number of text pages: 1-2

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LTA (23) · gas (7) · balloons (5) · navigation (4) · Ballonet (4) · balloon (4) · compartments (4) · propulsion (3) · Subsystem (3) · Frame (3) · method (2) · hot air (2) · fueling (2) · pressure (2) · dirigible (2) · Design (2) · safety (2) · Construction (2) · airship (2)
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