发明名称 Surfboard fin
摘要 A surfboard fin is disclosed which is formed of shaped plastic opposed members which are joined and sealed to form a hollow light-weight buoyant construction, which provides an external contour to reduce drag in surfboarding. The novel profiled plastic surfboard fin is readily mounted to conventional boards and replaces the present conventional fiberglass fins.
申请公布号 US4325154(A) 申请公布日期 1982.04.20
申请号 US19800135500 申请日期 1980.03.31
申请人 COLLUM, JR., WILLIAM E. 发明人 COLLUM, JR., WILLIAM E.
分类号 B63B35/79;B63B41/00;(IPC1-7):A63C15/05 主分类号 B63B35/79
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