Drilldown: Patents

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Patents > Grant date: 1900 - 1999 & Number of diagram pages: 2-3 & Number of figures: None

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Office:
Inventors:
Albert Hugo Friedel (2) · Albert Sugden (2)
Inventor country:
Applicant person:
None (17)
Applicant is inventor:
Tech fields:
airplane (12) · propeller (12) · None (11) · propulsion (11) · LTA (11) · frame (11) · navigation (8) · stability (7) · balloon (5) · dirigible (4) · Parachute (4) · hybrid (4) · airfoil (4) · Construction (3) · flapping (3) · rudder (3) · wings (3) · design (3)
Full specification filed date:
Application number:
None (16)
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Related to aircraft:
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Cites these patents:
Citations from after 1930:
Number of diagram pages:
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