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Patents > Office : CA or DE or GB & Number of text pages: 3-70 & Number of diagram pages: None

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LTA (6) · frame (6) · airplane (5) · balloon (5) · stability (5) · propeller (5) · propulsion (4) · design (4) · safety (4) · landing (3) · metal (3) · navigation (3) · None (3) · gas (3)
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