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发明名称
Testing apparatus
摘要
申请公布号
US1812985(A)
申请公布日期
1931.07.07
申请号
US19290359784
申请日期
1929.05.02
申请人
RESERVE HOLDING COMPANY
发明人
ROBINSON HAROLD C.;MALMBERG ANDERS M.
分类号
H04Q1/20
主分类号
H04Q1/20
代理机构
代理人
主权项
地址
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