Drilldown: Patents

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Patents > Supplementary to patent: None & Number of text pages: 8-30 & Number of diagram pages: 4-5

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Office:
Inventors:
De Bert Hartley (2)
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Applicant person:
None (5) · De Bert Hartley (2)
Applicant is inventor:
Tech fields:
stability (11) · Airplane (10) · None (8) · frame (8) · whole (5) · navigation (5) · propulsion (5) · propeller (4) · design (4) · wheels (3) · helicopter (3) · parachute (3)
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Supplementary to patent: (Click arrow to add another value)
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Citations from after 1930:
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