Drilldown: Patents

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Patents > Publication date: 1920 & Number of text pages: 3-5

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None (13) · Emil Schimanek (2) · Alexander Albert Holle (2) · Federico Caproni (2)
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None (16) · Emil Schimanek (2) · Alexander Albert Holle (2)
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None (16) · CPC B64C17/00 (3) · CPC B64C39/00 (2) · CPC B64C3/56 (2) · CPC B64C31/02 (2) · CPC B64C11/22 (2) · CPC B64D27/00 (2) · CPC B64C3/00 (2)
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