Drilldown: Patents

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Patents > Year filed: 1915 & Number of claims: 9-13

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airplane (8) · propeller (6) · wings (4) · stability (3) · None (3) · gyroscope (2) · automatic stability (2) · lift (2) · magnet (2) · metal (2) · military (2) · projectile (2) · safety (2) · camber (2) · electricity (2)
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