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toothless ruler / ruler

toothless ruler
toothless ruler

One day, I drew lines with the dull ruler. The line was not straight and it looks twisted.
If a ruler regularly can lead the line each .5 cm, it would be much more efficient.

When you make a chart, you need to check the point that you need.
What if you easily check the dimension without any number or sign?
I suggest new ruler that people can check dimension with only line, not a ruler.

One can easily draw chart and triangle using Toothless ruler.
For example, when drawing a chart, one can omit the course of re-measuring the size after drawing a line.

University

Seoul National University of Technology

Seoul National University of Technology
Yong-in, Gyeonggi-do, South Korea

Design

Seoul National University of Technology

Seoul National University of Technology
Yong-in, Gyeonggi-do, South Korea

Jun-se Kim