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Patents > Office : CA or CU or GR or RU & Number of diagram pages: 3-12

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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:
frame (14) · airplane (14) · LTA (11) · navigation (9) · propulsion (9) · propeller (7) · rudder (6) · design (6) · stability (5) · HTA (5) · compartments (5) · None (4) · car (4) · whole (4) · propellers (4) · construction (4) · Wings (4) · Airship (4)
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Citations from after 1930:
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