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发明名称
Rotating dial numeral clock
摘要
申请公布号
US2130873(A)
申请公布日期
1938.09.20
申请号
US19380191863
申请日期
1938.02.23
申请人
WARREN TELECHRON COMPANY
发明人
BOURQUIN EDGAR
分类号
G04B19/20
主分类号
G04B19/20
代理机构
代理人
主权项
地址
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