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发明名称
Multioffice telephone system
摘要
申请公布号
US1901177(A)
申请公布日期
1933.03.14
申请号
US19320602124
申请日期
1932.03.31
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
LEVY OSCAR C.
分类号
H04M7/06;H04Q3/00
主分类号
H04M7/06
代理机构
代理人
主权项
地址
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