Drilldown: Patents

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Patents > National tech categories: None & Number of text pages: 8-30 & Number of diagram pages: 3-4

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Inventors:
Elmer Ambrose Sperry (2) · Isaac Bell (2)
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Tech fields:
airplane (15) · frame (9) · design (7) · None (6) · construction (6) · Gyroscope (5) · electricity (5) · wings (5) · navigation (4) · propellers (4) · stability (4) · automatic stability (3) · instrument (3) · HTA (3) · military (3) · propulsion (3)
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Citations from after 1930:
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