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发明名称
Bi-directional electric counting system
摘要
申请公布号
US2893633(A)
申请公布日期
1959.07.07
申请号
US19570689457
申请日期
1957.10.10
申请人
HAAGEN RICHARD H VAN
发明人
HAAGEN RICHARD H. VAN
分类号
G06M1/10;G06M3/14;G06M7/00
主分类号
G06M1/10
代理机构
代理人
主权项
地址
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