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发明名称
Signaling system
摘要
申请公布号
US1777433(A)
申请公布日期
1930.10.07
申请号
US19240741636
申请日期
1924.10.04
申请人
WILLIAM HALE GEORGE
发明人
HALE GEORGE WILLIAM
分类号
H04B1/16;H04B5/00
主分类号
H04B1/16
代理机构
代理人
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地址
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