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发明名称
Telephone lock
摘要
申请公布号
US2194521(A)
申请公布日期
1940.03.26
申请号
US19380230376
申请日期
1938.09.17
申请人
ISAAC DAVIDSON
发明人
DAVIDSON ISAAC
分类号
H04M1/667
主分类号
H04M1/667
代理机构
代理人
主权项
地址
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