Drilldown: Patents

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Patents > Grant date: 1918 & Number of claims: 4-90 & Number of diagram pages: 3

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None (5) · navigation (3) · LTA (3) · frame (3) · electricity (3) · design (3) · compass (2) · safety (2) · landing (2) · hydroaeroplane (2) · gyroscope (2) · gyro-compass (2) · wings (2) · balloon (2)
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