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Patents > Patent agent : Victor J. Evans or W. S. Bellows & Number of diagram pages: 2-3

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Inventors:
George Lehberger (3) · Albert Sugden (2) · Axel R. Nordstrom (2)
Inventor country:
Applicant person:
George Lehberger (3) · Gustav F. Hellstrom Sr (2) · Albert Sugden (2) · Axel R. Nordstrom (2) · Carin E. Norwall (2) · Martin Bowman (2) · Gustav F. Hellstrom Jr (2)
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Tech fields:
None (19) · airplane (12) · frame (11) · stability (9) · navigation (8) · propeller (8) · rudder (6) · safety (5) · propulsion (5) · wheels (3) · LTA (3) · helicopter (3) · airfoil (3) · control (3) · hybrid (3)
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None (9)
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National tech categories:
None (10) · USPC 244/80 (6) · USPC 244/119 (4) · USPC 244/87 (3) · USPC 244/79 (3) · USPC 244/45R (3) · USPC 244/100R (2) · USPC 244/48 (2) · USPC 244/66 (2) · USPC 244/35R (2) · USPC 244/104R (2) · USPC 244/90R (2)
CPCs:
CPC B64C17/00 (12) · CPC B64C23/005 (6) · CPC B64C3/385 (4) · CPC B64C33/02 (3) · CPC B64C17/06 (3) · CPC B64C13/00 (3) · CPC B64C39/08 (2) · CPC B64C29/0033 (2) · CPC B64C2700/6295 (2) · CPC B64C25/52 (2) · CPC B64C9/00 (2) · CPC Y02E10/28 (2) · CPC B64C11/36 (2)
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Citations from after 1930:
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