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发明名称
Conversion of counters to adding machines
摘要
申请公布号
US3220645(A)
申请公布日期
1965.11.30
申请号
US19630278001
申请日期
1963.05.06
申请人
WALSH EDWARD C
发明人
WALSH EDWARD C.
分类号
G06M1/08;G06M1/28
主分类号
G06M1/08
代理机构
代理人
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