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发明名称
Calling device
摘要
申请公布号
US2068700(A)
申请公布日期
1937.01.26
申请号
US19350030799
申请日期
1935.07.11
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
PETERSON SETH
分类号
F16D41/12;H04M1/31
主分类号
F16D41/12
代理机构
代理人
主权项
地址
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