Drilldown: Patents

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Patents > Office: HU & Grant date: 1920 - 1929 & Number of diagram pages: 1-3

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airplane (27) · design (14) · Construction (13) · airship (11) · Frame (9) · motors (9) · propellers (9) · Biplane (8) · Aerodynamics (8) · wings (7) · subsystem (7) · military (6) · LTA (5) · safety (4) · HTA (4)
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None (15)
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