ARTICLE SUPERIOR IN DESIGN AND METHOD FOR PRODUCING THE SAME
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United States of America Patent
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Issued Date -
Jun 17, 2021
app pub date -
Nov 16, 2020
filing date -
Dec 11, 2019
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Abstract
An article that is made of a hard metal, yet is superior in design on the surface, particularly a metal article that allows aging impression of the color tone to be enjoyed is produced or provided. Such an article is provided by a method for producing an article superior in design, including molding and/or processing a copper alloy into a designed article, and subjecting a surface of the article to an etching treatment to allow a crystalline structure of the copper alloy to become visibly recognizable.
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