Drilldown: Patents

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Patents > Grant date: 1893 & Granted: Yes & Number of text pages: 2-3

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LTA (14) · propulsion (10) · None (6) · frame (5) · car (4) · navigation (4) · rocket (4) · propeller (4) · balloon (3) · dirigible (3) · motor (2) · Flapping (2) · whole (2) · projectile (2) · fan (2) · military (2) · electricity (2)
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