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Patents > Inventor country: None & Applicant is inventor: No & Grant date: 1920

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HELIX PROPELLER GES M (5) · MERCUR FLUGZEUGBAU (5) · KAWNEER (4) · HANRIOT (3) · John William Rapp (2) · EISENFUEHR (2) · OTWI WERKE M B H (2)
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CPC B64C3/00 (7) · CPC B64C2700/6233 (6) · CPC B64C17/00 (4) · CPC B64C2700/6256 (3) · CPC B64C9/00 (3) · CPC B64C11/00 (3) · CPC B64C11/04 (3) · CPC B64C2700/6212 (3) · CPC B64C25/62 (3) · CPC B64C39/00 (3) · CPC B64C23/005 (3) · CPC B64C2700/6295 (2) · CPC B64C1/00 (2) · CPC B64C3/18 (2) · CPC B64C35/00 (2) · CPC B64C2001/0081 (2) · CPC B64C2700/6274 (2) · CPC Y10T29/49332 (2) · CPC B64C13/00 (2) · CPC B64C11/36 (2)
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