Metal product manufacturing method
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United States of America Patent
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Jul 28, 2020
Grant Date -
Nov 22, 2018
app pub date -
May 18, 2018
filing date -
May 18, 2017
priority date (Note) -
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Abstract
A method of manufacturing a metal product includes forming a first identification code onto a surface of a metal member with a laser beam, the first identification code being readable under a first reading condition, and heating the metal member on which the identification code is formed. The method further includes reading the first identification code with a reading device, and forming a second identification code onto the surface of the metal member subsequent to the heating with a laser beam based on the first identification code which is read with the reading device. The second identification code is readable under a second reading condition different from the first reading condition.
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