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Patents > Office: CA & Number of diagram pages: 3-8

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Office: (Click arrow to add another value)
Inventors:
De Bert Hartley (2)
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Applicant person:
None (6) · De Bert Hartley (2)
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Applicant is inventor:
Tech fields:
airplane (11) · frame (11) · LTA (10) · navigation (10) · None (8) · propulsion (8) · propeller (8) · rudder (7) · stability (6) · design (6) · HTA (5) · compartments (4) · whole (4) · Construction (4) · wings (4) · airship (4)
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Citations from after 1930:
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