发明名称 Calculating devices
摘要 This invention relates generally to graphic calculating methods and apparatuses, and in particular to an apparatus by which the values and other factors pertaining to bonds, stocks and other securities may be calculated when certain values and other factors are known.
申请公布号 US4117973(A) 申请公布日期 1978.10.03
申请号 US19760702711 申请日期 1976.07.06
申请人 BOLD, EUGENE W. 发明人 BOLD, EUGENE W.
分类号 G06G1/00;G06G1/14;(IPC1-7):G06G1/14 主分类号 G06G1/00
代理机构 代理人
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