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专利名称：Device for measuring and teaching scales of
units
发明人：Betty F. Perry申请号：US11026900申请日：20041230公开号：US07076881B1公开日：20060718
专利附图：
摘要：A teaching device for teaching students different scales of measure and aidingin the taking of accurate measurements by users of the device includes a first face that ismarked with standard units of measure such as feet, inches, and fractions of inches. Each
scale represents a different unit of measure scale and is arranged next to smaller scale inan order such that the feet measurement is arranged next to the inch scale. The inchmeasure is also arranged to the half-inch scale which is arranged next to the quarter inchscale. This continues such that each succeeding scale is arranged between a larger andsmaller scale. A second face is marked with scales representing metric units of
measurement. Each scale on the second face represents a unit of measurement on oneorder of magnitude smaller than the preceding scale.
申请人：Betty F. Perry
地址：4832 Linshaw La. Virginia Beach VA 23455 US
国籍：US
代理人：Richard C. Litman
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