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发明名称
Signalling device using store customer's service numbers
摘要
申请公布号
US2761231(A)
申请公布日期
1956.09.04
申请号
US19530350023
申请日期
1953.04.21
申请人
HESS GEORGE R
发明人
HESS GEORGE R.
分类号
A47F13/00
主分类号
A47F13/00
代理机构
代理人
主权项
地址
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