发明名称 |
Slide rule |
摘要 |
A novel product selection slide rule is disclosed which allows the user of the slide rule to quickly determine which product from a grouping of products is best for a particular condition or property which he selects. The applicant's slide rule isolates the product best suited to the application out of a multiplicity of products and possibilities. The novel slide rule comprises a front and back cover with the front cover containing a plurality of viewing apertures and a plurality of stylus apertures. Between the front and back cover is positioned a central filler and a plurality of movable elongated slides are positioned within an elongated opening in the central filler. Each slide has formed thereon predetermined zones of different indicia for viewing through a plurality of viewing aperatures on the front cover.
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申请公布号 |
US4241867(A) |
申请公布日期 |
1980.12.30 |
申请号 |
US19790049973 |
申请日期 |
1979.06.19 |
申请人 |
GRAPHIC CALCULATOR |
发明人 |
DUGAS, MADELEINE L;WOLF, ROBERT H |
分类号 |
G06G1/06;(IPC1-7):G06C3/00 |
主分类号 |
G06G1/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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