Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yoshihiro Matsubara0
Kenji Nunome0
Osamu Yoshimoto0
Wataru Matsutani0
Date of Patent
June 3, 2008
0Patent Application Number
105147860
Date Filed
March 22, 2004
0Patent Primary Examiner
Patent abstract
An object of the invention is to provide a spark plug having a discharge portion made of a precious metal tip, in which peeling of the precious metal tip from a surface of the discharge portion can be suppressed while spark abrasion, oxidation abrasion and abnormal abrasion of the discharge portion can be suppressed.
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