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Patents > Year granted: 1920 - 1929 & CPCs : CPC B64B1/00 or CPC B64C3/00

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None (13) · Jean-Adolphe Leseurre (3) · Charles-Édouard-Pierre Gourdou (3) · Ernst Heinkel (2) · John W RAPP (2) · Harold J. Horn (2) · Joseph Vanorio (2) · Gianni Caproni (2) · Gabriel Letsch (2) · Hugo Junkers (2) · Francis J PLYM (2) · Ralph Hazlett UPSON (2) · James Jacob Mayrow (2)
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None (18) · Jean-Adolphe Leseurre (3) · John William Rapp (3) · Charles-Édouard-Pierre Gourdou (3) · KAWNEER (3) · Ernst Heinkel (2) · Harold J. Horn (2) · GOODYEAR TIRE RUBBER (2) · Gianni Caproni (2) · Joseph Vanorio (2) · James Jacob Mayrow (2)
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None (10)
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