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经营范围
发明名称
Wireless signalling system
摘要
申请公布号
GB389869(A)
申请公布日期
1933.03.17
申请号
GB19320026131
申请日期
1931.08.17
申请人
HAZELTINE CORPORATION
发明人
分类号
H03J3/06
主分类号
H03J3/06
代理机构
代理人
主权项
地址
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