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发明名称
BELLS AND LIKE SIGNALLING DEVICES
摘要
申请公布号
CA731287(A)
申请公布日期
1966.03.29
申请号
CAD731287
申请日期
申请人
V AND E FRIEDLAND LIMITED
发明人
JOHN DOGGART
分类号
主分类号
代理机构
代理人
主权项
地址
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