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The beauty of Sweet Paralellogram Ruler is in its simplicity. The issue of being unable to pick up a flat ruler off a flat surface can be irritating especially for those with stubby or clumsy fingers. This design eliminates this issue by always having an inverted edge available to pick up, no matter what side the ruler is resting on.
National Taipei University of Technology
Zhonghe City, Taipei County, Taiwan
Wen-Tsung Lin; Wan-Rurng Hung