Method for securing a metal noble tip to an electrode of a spark plug using a resistance and laser welding process
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United States of America Patent
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Feb 23, 2010
Grant Date -
Dec 7, 2006
app pub date -
Nov 18, 2004
filing date -
Nov 21, 2003
priority date (Note) -
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Abstract
There is provided a method for producing a spark plug in which welding strength between a noble metal tip and an electrode joined by laser welding can be restrained from becoming weak.).
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