The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2008
Filed:
Mar. 22, 2004
Applicants:
Osamu Yoshimoto, Nagoya, JP;
Wataru Matsutani, Nagoya, JP;
Yoshihiro Matsubara, Nagoya, JP;
Kenji Nunome, Nagoya, JP;
Inventors:
Osamu Yoshimoto, Nagoya, JP;
Wataru Matsutani, Nagoya, JP;
Yoshihiro Matsubara, Nagoya, JP;
Kenji Nunome, Nagoya, JP;
Assignee:
NGK Spark Pulg Co., Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T 13/20 (2006.01);
U.S. Cl.
CPC ...
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.