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Patents > Year filed: 1881 & Year granted: 1880 - 1889 & Office : LU or NL or US or Other & First filing : No or Other

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LTA (16) · balloon (7) · frame (7) · navigation (6) · propulsion (4) · car (4) · None (2) · Flying machine (2) · whole (2) · hybrid (2) · Windmill (2) · control (2)
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