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发明名称
Intercommunicating system and apparatus therefor
摘要
申请公布号
US2121883(A)
申请公布日期
1938.06.28
申请号
US19370138894
申请日期
1937.04.26
申请人
S. M. SALTZMAN
发明人
PARKER LOUIS W.
分类号
H04M1/60;H04M9/00
主分类号
H04M1/60
代理机构
代理人
主权项
地址
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