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发明名称
Calculating machine
摘要
申请公布号
US1765697(A)
申请公布日期
1930.06.24
申请号
US19280262970
申请日期
1928.03.19
申请人
PALMER NELSON P;HERRON WILMER B
发明人
PALMER NELSON P.;HERRON WILMER B.
分类号
G06G1/00
主分类号
G06G1/00
代理机构
代理人
主权项
地址
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