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发明名称
Telephone muffler
摘要
申请公布号
US1800234(A)
申请公布日期
1931.04.14
申请号
US19290375065
申请日期
1929.07.01
申请人
TUTTLE HARRY C
发明人
TUTTLE HARRY C.
分类号
H04M1/19
主分类号
H04M1/19
代理机构
代理人
主权项
地址
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