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发明名称
MECHANICAL CALCULATING APPARATUS FOR ADDING,SUBTRACTING,MULTIPLYING AND DIVIDING
摘要
申请公布号
US3698629(A)
申请公布日期
1972.10.17
申请号
USD3698629
申请日期
1969.08.19
申请人
RICOH:KK.
发明人
THOMAS K. MCGOURTY
分类号
G06C11/00;G06C15/08;G06C23/00;(IPC1-7):G06C23/00;G06C11/04;G06C19/04
主分类号
G06C11/00
代理机构
代理人
主权项
地址
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