CPC B64C39/06

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CPC B64C39/06 is a technological category in the Cooperative Patent Classification (CPC) system covering patents related to Aircraft with disc- or ring-shaped wings.[1][2]

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Enclosing categories CPC B64C39/06
Subcategories CPC B64C39/062, CPC B64C39/066, CPC B64C39/068
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