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经营范围
发明名称
REMOTE TELEPHONE EXTENSION SYSTEM
摘要
申请公布号
CA730770(A)
申请公布日期
1966.03.22
申请号
CAD730770
申请日期
申请人
SIBANY CORPORATION
发明人
MARVIN MILLER
分类号
主分类号
代理机构
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