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发明名称
Polarized magneto signal device
摘要
申请公布号
US2740956(A)
申请公布日期
1956.04.03
申请号
US19510252075
申请日期
1951.10.19
申请人
INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION
发明人
HATTON WILLIAM
分类号
G08B5/28
主分类号
G08B5/28
代理机构
代理人
主权项
地址
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