Drilldown: Patents

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Patents > CPCs : CPC B64C2700/6274 or CPC Y02T50/10 & Number of claims: 4-90

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Office:
Inventors:
Thomas Augustus Dring (2) · Jean Desbois (2) · Ernest William Welsh (2)
Inventor country:
Applicant person:
None (2) · Ernest William Welsh (2) · Thomas Augustus Dring (2) · Jean Desbois (2)
Applicant is inventor:
Tech fields:
None (21) · Airplane (10) · Propulsion (6) · Frame (6) · design (5) · propellers (5) · whole (4) · stability (4) · helicopter (4) · construction (4) · propeller (3) · Hybrid (3) · Control (3) · Ascension (3) · HTA (2) · takeoff (2) · Steering (2) · aerodynamics (2) · Cables (2) · heavier-than-air (2)
Full specification filed date:
Application number:
None (2)
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Citations from after 1930:
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