发明名称 Compound speaker for a portable communication device
摘要 A compound speaker has first and second sound production devices provided in a case. First and second sound discharge holes are formed in the case for discharging sounds produced by the first and second sound production devices, respectively. The first sound discharge hole is formed in a peripheral side wall of the case so as to discharge sounds in a lateral direction.
申请公布号 US2003059079(A1) 申请公布日期 2003.03.27
申请号 US20020245391 申请日期 2002.09.18
申请人 CITIZEN ELECTRONICS CO., LTD. 发明人 ASAHINA MASATO;FURUYA MASAHITO
分类号 H04R9/06;H04M1/02;H04M1/03;H04R1/02;H04R1/26;H04R9/10;(IPC1-7):H04R25/00;H04R1/00;H04R11/02 主分类号 H04R9/06
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