Drilldown: Patents

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Patents > Year granted: 1910 - 1919 & Office : AH or BE or NL or NZ or Other & Related to aircraft : 1? or None & Number of diagram pages: 3-50000000

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None (8) · airplane (7) · stability (6) · frame (5) · Control (4) · propulsion (4) · propellers (3) · propeller (2) · navigation (2) · Hydroplane (2) · electricity (2) · helicopter (2) · construction (2)
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National tech categories:
None (14) · FR 6.4 (4) · USPC 244/78.1 (2)
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