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发明名称
Telephone plant
摘要
申请公布号
US1877672(A)
申请公布日期
1932.09.13
申请号
US19310540158
申请日期
1931.05.26
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
LARSSON KNUT;PALMGREN NILS GUNNAR
分类号
H04Q3/42
主分类号
H04Q3/42
代理机构
代理人
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地址
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