EP1139458-A2 -- EP977290-A1   MATSUSHITA ELECTRIC IND CO LTD (MATU)   TSURUTANI S,  MIZUTANI S,  YOSHIO H,  MASUMOTO K,  KOBAYASHI H;  EP1059681-A2   NGK INSULATORS LTD (NIGA)   NEMOTO H,  OHTUBO S,  YOSHIDA T;  JP10162801-A   NISSAN MOTOR CO LTD (NSMO)   HORIE H;  JP10284033-A   MIKUNI KOGYO KK (MIKN)   ASUKE Y;  US2002006540-A1 -- US6355372-B2   SONY CORP (SONY);  WAKO ELECTRONICS CO LTD (WAKO-Non-standard)   YAMAHIRA T,  WATANABE A,  KAMEISHI T,  KIHARA K;  US6866961-B2 -- EP895297-A1   NGK INSULATORS LTD (NIGA)   NEMOTO H,  KUROKAWA T,  KITOH K;  JP11049217-A   ;  US5571632-A   SONY CORP (SONY)   TERAMOTO K;  US20010049054-A1   ;  US6468692-B1   NGK INSULATORS LTD (NIGA)   NEMOTO H,  OHTUBO S,  YOSHIDA T;  US6355372-B2   SONY CORP (SONY);  WAKO ELECTRONICS CO LTD (WAKO-Non-standard)   YAMAHIRA T,  WATANABE A,  KAMEISHI T,  KIHARA K;  EP977290-A1   MATSUSHITA ELECTRIC IND CO LTD (MATU)   TSURUTANI S,  MIZUTANI S,  YOSHIO H,  MASUMOTO K,  KOBAYASHI H;  EP1059681-A2   NGK INSULATORS LTD (NIGA)   NEMOTO H,  OHTUBO S,  YOSHIDA T;  JP10162801-A   NISSAN MOTOR CO LTD (NSMO)   HORIE H;  JP10284033-A   MIKUNI KOGYO KK (MIKN)   ASUKE Y;  US6344292-B1   NGK INSULATORS LTD (NIGA)   NEMOTO H,  KUROKAWA T,  KITOH K;  US6387561-B1   NGK INSULATORS LTD (NIGA)   NEMOTO H,  KITOH K,  ENOMOTO A;  US2005079405-A1 -- US5571632-A   SONY CORP (SONY)   TERAMOTO K;  US20010049054-A1   ;  US6344292-B1   NGK INSULATORS LTD (NIGA)   NEMOTO H,  KUROKAWA T,  KITOH K;  US6387561-B1   NGK INSULATORS LTD (NIGA)   NEMOTO H,  KITOH K,  ENOMOTO A;  US6468692-B1   NGK INSULATORS LTD (NIGA)   NEMOTO H,  OHTUBO S,  YOSHIDA T;  US6355372-B2   SONY CORP (SONY);  WAKO ELECTRONICS CO LTD (WAKO-Non-standard)   YAMAHIRA T,  WATANABE A,  KAMEISHI T,  KIHARA K;  US6844110-B2   NGK INSULATORS LTD (NIGA)   ENOMOTO A,  KAWAMURA K,  KITOH K,  YOSHIDA T,  NEMOTO H,  OTSUBO S;  JP3683181-B2 -- JP07169452-A   ;  JP08250084-A   ;  JP08287896-A   ;  JP09293490-A   ;  JP11049217-A   ;  JP11154500-A   ;  JP11176447-A   ;  JP2000003726-A   NGK INSULATORS LTD (NIGA)   KITOH K,  KUROKAWA T,  NEMOTO H;  JP2000067919-A   ;  JP2001102025-A   ;  JP84041867-U   ;  JP88009766-U   ;  JP91004651-U   ;  US7147962-B2 -- EP895297-A1   NGK INSULATORS LTD (NIGA)   NEMOTO H,  KUROKAWA T,  KITOH K;  EP977290-A1   MATSUSHITA ELECTRIC IND CO LTD (MATU)   TSURUTANI S,  MIZUTANI S,  YOSHIO H,  MASUMOTO K,  KOBAYASHI H;  EP1059681-A2   NGK INSULATORS LTD (NIGA)   NEMOTO H,  OHTUBO S,  YOSHIDA T;  JP08250084-A   ;  JP08287896-A   ;  JP10162801-A   NISSAN MOTOR CO LTD (NSMO)   HORIE H;  JP10284033-A   MIKUNI KOGYO KK (MIKN)   ASUKE Y;  JP11049217-A   ;  JP11154500-A   ;  JP59041867-A   ;  JP63009766-A   ;  JP2001102025-A   ;  US5571632-A   SONY CORP (SONY)   TERAMOTO K;  US20010049054-A1   ;  US6344292-B1   NGK INSULATORS LTD (NIGA)   NEMOTO H,  KUROKAWA T,  KITOH K;  US6387561-B1   NGK INSULATORS LTD (NIGA)   NEMOTO H,  KITOH K,  ENOMOTO A;  US6468692-B1   NGK INSULATORS LTD (NIGA)   NEMOTO H,  OHTUBO S,  YOSHIDA T;  US6355372-B2   SONY CORP (SONY);  WAKO ELECTRONICS CO LTD (WAKO-Non-standard)   YAMAHIRA T,  WATANABE A,  KAMEISHI T,  KIHARA K;  US6844110-B2   NGK INSULATORS LTD (NIGA)   ENOMOTO A,  KAWAMURA K,  KITOH K,  YOSHIDA T,  NEMOTO H,  OTSUBO S;  EP1139458-B1 -- EP977290-A1   MATSUSHITA ELECTRIC IND CO LTD (MATU)   TSURUTANI S,  MIZUTANI S,  YOSHIO H,  MASUMOTO K,  KOBAYASHI H;  EP1059681-A2   NGK INSULATORS LTD (NIGA)   NEMOTO H,  OHTUBO S,  YOSHIDA T