Spark plug and method for producing it
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United States of America Patent
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Dec 29, 2009
Grant Date -
May 18, 2006
app pub date -
Mar 10, 2004
filing date -
Mar 18, 2003
priority date (Note) -
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Abstract
A spark plug for an internal combustion engine, the spark plug having at least two electrodes, in which the electrodes are formed of a first part made of a substrate material and a surface part more durable than the substrate material. The surface part of the spark plug is joined to the first part via an intermediate part making use of explosion welding. The method also relates to a method for producing a spark plug for an internal combustion engine, the spark plug having at least two electrodes.
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