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. 14, 1981
Filed:
Dec. 08, 1978
Applicant:
Inventors:
Kanemitsu Nishio, Komaki, JP;
Shunichi Takagi, Tajimi, JP;
Assignee:
NGK Spark Plug Co., Ltd., Nagoya City, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T / ; H01T / ;
U.S. Cl.
CPC ...
29 2512 ; 313141 ; 313143 ;
Abstract
An ignition plug insulator provided at its front end with a closed ignition portion. The closed front end of the ignition portion is impregnated with an electric conductivity imparting material to form a ceramic electrode. Alternatively, the ceramic electrode may be incorporated in the closed front end of the ignition portion or filled in an axial bore provided in the insulation.