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发明名称
AUTOMATIC SWITCHING SYSTEM
摘要
申请公布号
US3493691(A)
申请公布日期
1970.02.03
申请号
USD3493691
申请日期
1967.02.23
申请人
MICHITAKA SHIMIZU;TATSUYUKI SUZUKI
发明人
MICHITAKA SHIMIZU;TATSUYUKI SUZUKI
分类号
H04Q3/00;(IPC1-7):H04M3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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