EP1006354-A2 -- EP60944-A   ;  EP678740-A1   NGK INSULATORS LTD (NIGA)   KATO N,  NAKAGAKI K;  EP902279-A1   NGK SPARK PLUG CO LTD (NITS)   INOUE R,  KITANOYA S,  KATO K,  FUMA T,  OSHIMA T;  EP517364-A2   FORD MOTOR CO LTD (FORD);  FORD FRANCE SA (FORD);  FORD WERKE AG (FORD);  FORD MOTOR CO (FORD)   LOGOTHETIS E M,  SOLTIS R E;  EP731351-A2   NGK INSULATORS LTD (NIGA)   KATO N;  EP807818-A2   NGK INSULATORS LTD (NIGA)   KATO N,  INA N;  EP831322-A2   NGK INSULATORS LTD (NIGA)   KATO N,  NAKAGAKI K;  EP833148-A2   ;  GB2182447-A   HONDA GIKEN KOGYO KK (HOND)   NAKAJIMA T,  OKADA Y,  MIENO T,  OHNO N W;  US6325906-B1 -- EP902279-A1   NGK SPARK PLUG CO LTD (NITS)   INOUE R,  KITANOYA S,  KATO K,  FUMA T,  OSHIMA T;  EP903576-A2   NGK SPARK PLUG CO LTD (NITS)   INQUE R,  KITANOYA S,  KATO K,  FUMA T;  US4722779-A   ;  US4765880-A   ;  US5250169-A   FORD MOTOR CO LTD (FORD);  FORD FRANCE SA (FORD);  FORD WERKE AG (FORD);  FORD MOTOR CO (FORD)   LOGOTHETIS E M,  SOLTIS R E;  US5281313-A   ;  US5433830-A   NGK SPARK PLUG CO LTD (NITS)   KAWAI T,  HAYAKAWA N,  YAMADA T;  US5630920-A   BOSCH GMBH ROBERT (BOSC)   FRIESE K,  WIEDENMANN H,  STANGLMEIER F;  US5879525-A   NGK INSULATORS LTD (NIGA)   KATO N;  US5893968-A   NGK INSULATORS LTD (NIGA)   KATO N;  US5895564-A   ;  US5985118-A   NIPPON JIDOSHA BUHIN SOGO (NIJI);  NIPPONDENSO CO LTD (NPDE)   MAKINO T,  MIZUTANI K,  OTA H,  HIJIKATA Y,  NAKAMURA K,  MORI Y;  JP3540177-B2 -- JP08247995-A   ;  JP09311120-A   ;  JP10019843-A   NGK SPARK PLUG CO LTD (NITS)   KITANOYA S,  INOUE T,  OSHIMA T,  KUROKI Y;  JP10104200-A   ;  JP10177008-A   NGK SPARK PLUG CO LTD (NITS)   OSHIMA T,  ANDO M,  ISHIDA N,  SUGAYA S,  NADANAMI N;  JP10185868-A   NIPPON JIDOSHA BUHIN SOGO (NIJI);  NIPPONDENSO CO LTD (NPDE)   MAKINO T,  MIZUTANI K,  OTA H,  HIJIKATA Y,  NAKAMURA K,  MORI Y;  JP10197479-A   NGK SPARK PLUG CO LTD (NITS)   INOUE R,  FUMA T,  KITANOYA S,  MIZUTANI Y,  KIDA M,  OSHIMA T,  HIBINO T;  JP10260158-A   NGK SPARK PLUG CO LTD (NITS)   INOUE R,  FUMA T,  KITANOYA S,  MIZUTANI Y,  KIDA M,  OSHIMA T,  HIBINO T