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发明名称
Case signaling mechanism for keyboard controlled telegraph apparatus
摘要
申请公布号
US1974307(A)
申请公布日期
1934.09.18
申请号
US19330686217
申请日期
1933.08.22
申请人
CREED AND COMPANY, LIMITED
发明人
GRIFFITH RONALD GEORGE
分类号
H04L17/04
主分类号
H04L17/04
代理机构
代理人
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地址
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