CPC B63B2221/06
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CPC B63B2221/06 is a patent class for xyz.[1][2]
References
This wiki has 1 patents in category "CPC B63B2221/06".
Patents in category CPC B63B2221/06
- Patent US-1915-1358430 (English title: Propeller, Inventors: Hermann Faehrmann, Filing date: 1915-10-27)
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