发明名称 Earphone cord take-up device
摘要 An earphone cord take-up device is provided and consists of a hollow casing worn on a belt in which an earphone cord that is electrically connected within the casing to a jack cord can be extended therefrom when needed. Within the casing are stop rests for the earphones when the earphones are in the retracted positon.
申请公布号 US4942617(A) 申请公布日期 1990.07.17
申请号 US19880288775 申请日期 1988.12.22
申请人 BOYLAN, MARK 发明人 BOYLAN, MARK
分类号 H04M1/05;H04R1/10;H04R5/033 主分类号 H04M1/05
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