Drilldown: Patents

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Patents > Office : CA or DE or NO or US & Inventor country : AT or Brazil or DE or None & Grant date: 1890 - 1899 & Number of text pages: 2

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LTA (12) · propulsion (9) · navigation (8) · balloon (6) · frame (5) · car (5) · propeller (4) · airfoil (4) · None (3) · dirigible (3) · stability (3) · airship (3) · propellers (3) · balloons (3)
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