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发明名称
Piezoelectric sound generator for telephone set
摘要
申请公布号
IT1169689(B)
申请公布日期
1987.06.03
申请号
IT19830023643
申请日期
1983.11.09
申请人
GTE AUTOMATIC ELECTRIC INC
发明人
SUBLETTE JOHN D
分类号
G10K9/122;(IPC1-7):G10K/
主分类号
G10K9/122
代理机构
代理人
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