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Patents > National tech categories : CH 129b or USPC 244/79 & Family year: 1900 - 1999

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Office:
Inventors:
Alfred John Macy (4) · Adalbert Plaček (2) · Edmund Sparmann (2) · Dane Hurlburt (2) · Joseph Wetterwald (2) · Otto Schüle (2) · Carl Franz Hubert Hertel (2) · Carl Wilhelm Paul (2)
Inventor country:
Applicant person:
Alfred John Macy (4) · None (3) · Carl Franz Hubert Hertel (2) · Adalbert Plaček (2) · Joseph Wetterwald (2) · Otto Schüle (2) · Dane Hurlburt (2) · Carl Wilhelm Paul (2) · Edmund Sparmann (2)
Applicant is inventor:
Tech fields:
Airplane (30) · stability (27) · automatic stability (14) · Design (13) · gyroscope (10) · Control (9) · subsystem (8) · frame (8) · wings (7) · propellers (6) · Construction (6) · Lift (5) · None (5) · rudder (4) · equilibrium (4) · whole (4) · HTA (4) · Aerodynamics (4)
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Citations from after 1930:
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