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发明名称
Toll telephone switching apparatus
摘要
申请公布号
US1894090(A)
申请公布日期
1933.01.10
申请号
US19150531310
申请日期
1915.06.11
申请人
FRIENDLY, MILTON S. FRIENDLY;CENTRAL REPUBLIC BANK;TRUST COMPANY
发明人
BURNS ARCHIBALD E.
分类号
H04M5/08
主分类号
H04M5/08
代理机构
代理人
主权项
地址
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