CPC B64D2700/62692

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Tractive or propulsive propellers; maybe deals also with propeller arrangement?

Deleted in 2017 and shared out among various other categories in CPC B64D[1]

Enclosing categories CPC B64D/62
Subcategories
Keywords Propellers
Start year
End year


Patents in category CPC B64D2700/62692

References