Article e.g. setsquare, for assisting person in tracing lines on support using pen, has body including edge on which marks are printed such that body is calibrated, where article is made of polycarbonate

摘要

The article (20) has a body (24) including an edge (28) on which marks (30) are printed such that the body is calibrated, where the article is made of polycarbonate. The article is transparent and colored.