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:
Mar. 29, 2011
Filed:
Feb. 27, 2008
Applicants:
Kenji Kobayashi, Aichi, JP;
Makoto Yamaguchi, Aichi, JP;
Inventors:
Kenji Kobayashi, Aichi, JP;
Makoto Yamaguchi, Aichi, JP;
Assignee:
NGK Spark Plug Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01T 21/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for manufacturing a spark plug and a spark plug manufactured by the method in which a gasket used for securing the air-tightness when mounting the spark plug on an internal-combustion engine is prevented from falling out from the metal shell with a simple step.