Inventor
SAKURA AKIO
JP5 patents
Patents
5 patentsUS5877584AMar 2, 1999
Spark plug for an internal combustion engine
NGK SPARK PLUG CO40 citations92
US6750597B1Jun 15, 2004
Method for manufacturing spark plug and spark plug
NGK SPARK PLUG CO36 citations89
US6997767B2Feb 14, 2006
Method for manufacturing a spark plug, and spark plug
NGK SPARK PLUG CO16 citations80
US4814665AMar 21, 1989
Center electrode structure for spark plug
NGK SPARK PLUG CO15 citations72
US4808135AFeb 28, 1989
Center electrode structure for spark plug
NGK SPARK PLUG CO9 citations72