Inventor

UEMURA YOSHITO

JP2 patents

Patents

2 patents

US6538365B2Mar 25, 2003

Metal member with chromate coat, spark plug with chromate coat and manufacturing methods thereof

NGK SPARK PLUG CO12 citations71

US6688932B2Feb 10, 2004

Method for manufacturing spark plug and caulking metallic mold

NGK SPARK PLUG CO3 citations61