CPC B64D3/00
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CPC B64D3/00 is a patent class for xyz.[1][2]
References
This wiki has 1 patents in category "CPC B64D3/00".
Patents in category CPC B64D3/00
- Patent US-1897-621195 (English title: Navigable balloon, Inventors: Ferdinand Graf Zeppelin, Supplementary to patent: Patent DE-1895-98580, Filing date: 1897-12-29)
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