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:
May. 06, 2014
Filed:
Apr. 12, 2011
Applicants:
Hiroaki Nasu, Gifu, JP;
Makoto Sugita, Nagoya, JP;
Akito Sato, Obu, JP;
Shingo Kuwahara, Nagoya, JP;
Inventors:
Hiroaki Nasu, Gifu, JP;
Makoto Sugita, Nagoya, JP;
Akito Sato, Obu, JP;
Shingo Kuwahara, Nagoya, JP;
Assignee:
NGK Spark Plug Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T 13/39 (2006.01);
U.S. Cl.
CPC ...
Abstract
A spark plug having a metallic shell covered with a nickel plating layer and having a groove portion formed between a tool engagement portion and a gas seal portion and having an orthogonal-to-axis sectional area of 36 mmor less.