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:
Apr. 19, 2022
Filed:
Aug. 18, 2021
Applicant:
Ngk Spark Plug Co., Ltd., Nagoya, JP;
Inventor:
Junji Kimura, Nagoya, JP;
Assignee:
NGK SPARK PLUG CO., LTD., Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T 13/58 (2020.01); H01T 13/02 (2006.01); H01T 21/02 (2006.01); B23K 26/359 (2014.01);
U.S. Cl.
CPC ...
H01T 13/58 (2013.01); H01T 13/02 (2013.01); H01T 21/02 (2013.01); B23K 26/359 (2015.10);
Abstract
A spark plug including an insulator and a metallic member such as a metallic shell. In the spark plug, a mark such as a two-dimensional code is provided on the surface of at least one of the insulator and the metallic member. Also, a protective layer covers the mark. The protective layer is optically transparent and contains a fluorescent substance.