Abstract: An article allows an engraved code to be detected. The engraved code includes a plurality of dot dented portions defined on the article. Each of the dot dented portions has a quadrilateral pyramid shape with a coating layer on a prior stage dented portion having a quadrilateral pyramid shape. Corner dented portions dented at acute angles outward along a diagonal direction are defined at four corner positions of an opening peripheral edge portion of the prior stage dented portion.

Abstract: An engraved code includes a plurality of dot dented portions defined on an article. The engraved code includes an opening peripheral edge portion of each of the dot dented portions which has a polygonal or quadrilateral shape. This configuration leads to detection of each dot dented portion as a polygonal or quadrilateral dot.

Abstract: A managed article that allows an engraved code to be detected. The engraved code including a plurality of dot dented portions is formed on a managed article. Each of the dot dented portions has a quadrilateral pyramid shape with a coating layer formed on a prior stage dented portion (15) having a quadrilateral pyramid shape. Corner dented portions (25) dented at acute angles outward along a diagonal direction are formed at four corner positions of an opening peripheral edge portion (22) of the prior stage dented portion. This configuration leads to detection of the dot dented portion as a quadrilateral dot. In addition, the present configuration allows a coating material to be introduced into the corner dented portions at the time of the coating, thereby contributing to preventing or reducing inward projection of the coating layer at the corner positions of the dot dented portion.

Abstract: Provided is a managed article that allows an engraved code to be excellently detected. An engraved code 11including a plurality of dot dented portions 15 is forced: on a managed article 10. The engraved code 11 includes. An opening peripheral edge portion 22 of each of the dot dented portions 15 has a quadrilateral shape. This configuration leads to detection of the dot dented portion as a quadrilateral dot. Therefore, this configuration allows the engraved code to be excellently detected.