Drilldown: Patents
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Office: (Click arrow to add another value)
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None (1) ·
aerodynamics (1) ·
aeroplane (1) ·
airplane (3) ·
airship (1) ·
ascension (1) ·
design (2) ·
gyroscope (2) ·
heavier-than-air (2) ·
helicopter (4) ·
hybrid (4) ·
hydroplane (1) ·
lift (1) ·
metal (1) ·
propeller (2) ·
propellers (5) ·
propulsion (5) ·
safety (1) ·
stability (1) ·
sustentation (3) ·
takeoff (1)
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None (1) ·
15045D (1) ·
15387D (1) ·
381251D (1) ·
409229D (1) ·
410221D (1) ·
420550D (1) ·
424499D (1) ·
437780D (1) ·
464461D (1)
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