EP940641-A2 -- DE4329477-A1   ;  EP622445-A1   MITSUBISHI DENKI KK (MITQ)   HIRAHARA T,  KAWAGUCHI S,  SHIMIZU T,  KAWASAKI K,  MASUDA N,  OGASAWARA S,  KONISHI H,  MARUYAMA H,  SUMIDA Y,  UEYAMA A,  TOYOMA S,  SUZUKI S,  AKAHORI Y;  EP821046-A1   MATSUSHITA ELECTRIC IND CO LTD (MATU)   YOSHIDA Y,  FUNAKURA M,  MATSUO M,  OKAZA N;  US5401433-A   ;  US5711165-A   HITACHI LTD (HITA)   LIZUKA T,  NAKA R,  FUKUDA K,  TANAKA M,  HOMMA Y,  HATA H,  KOUSOKABE H,  NARIYOSHI K,  IWATA H;  WO1994005956-A1   ;  WO1997026238-A1   ;  US6044660-A -- US4482465-A   PHILLIPS PETROLEUM CO (PHIP)   GRAY R A;  US5531080-A   MITSUBISHI DENKI KK (MITQ)   HIRAHARA T,  KAWAGUCHI S,  SHIMIZU T,  KAWASAKI K,  MASUDA N,  OGASAWARA S,  KONISHI H,  MARUYAMA H,  SUMIDA Y,  UEYAMA A,  TOYOMA S,  SUZUKI S,  AKAHORI Y;  US5858266-A   IDEMITSU KOSAN CO LTD (IDEK)   KANEKO M;  US6216476-B1 -- US4482465-A   PHILLIPS PETROLEUM CO (PHIP)   GRAY R A;  US5454963-A   IDEMITSU KOSAN CO LTD (IDEK)   KANEKO M;  US5531080-A   MITSUBISHI DENKI KK (MITQ)   HIRAHARA T,  KAWAGUCHI S,  SHIMIZU T,  KAWASAKI K,  MASUDA N,  OGASAWARA S,  KONISHI H,  MARUYAMA H,  SUMIDA Y,  UEYAMA A,  TOYOMA S,  SUZUKI S,  AKAHORI Y;  US5553465-A   HITACHI LTD (HITA)   FUKUDA K,  IIZUKA T,  NAKA R,  HATA H,  GOMMORI M,  HOMMA Y;  US5620950-A   ASAHI DENKA KOGYO KK (ASAE)   KAMAKURA T,  TANAKA N,  NAMIWA K,  TATSUMI Y,  NAMIKI M;  US5728655-A   MITSUBISHI OIL CO (MISQ);  MITSUBISHI JUKOGYO KK (MITO)   MURAKI M,  BEPPU K,  KONISHI S,  HAMADA T,  MURATA N,  NISHIURA N;  US5858266-A   IDEMITSU KOSAN CO LTD (IDEK)   KANEKO M;  EP940641-B1 -- DE4329477-A1   ;  EP622445-A1   MITSUBISHI DENKI KK (MITQ)   HIRAHARA T,  KAWAGUCHI S,  SHIMIZU T,  KAWASAKI K,  MASUDA N,  OGASAWARA S,  KONISHI H,  MARUYAMA H,  SUMIDA Y,  UEYAMA A,  TOYOMA S,  SUZUKI S,  AKAHORI Y;  EP821046-A1   MATSUSHITA ELECTRIC IND CO LTD (MATU)   YOSHIDA Y,  FUNAKURA M,  MATSUO M,  OKAZA N;  US5401433-A   ;  US5711165-A   HITACHI LTD (HITA)   LIZUKA T,  NAKA R,  FUKUDA K,  TANAKA M,  HOMMA Y,  HATA H,  KOUSOKABE H,  NARIYOSHI K,  IWATA H;  WO1994005956-A1   ;  WO1997026238-A1   ;  JP3592514-B2 -- JP05157379-A   ;  JP06115924-A   ;  JP06129722-A   ;  JP06166884-A   ;  JP07208819-A   ;  JP07229654-A   ;  JP07269996-A   ;  JP08176536-A   ;  JP10008082-A   IDEMITSU KOSAN CO LTD (IDEK)   KANEKO M,  KONISHI T,  ICHITANI K;  JP10042585-A   TOSHIBA KK (TOKE)   KAMIMURA T,  SANO T,  TANAKA H,  MOTOHASHI H;  MY133864-A -- US4482465-A   PHILLIPS PETROLEUM CO (PHIP)   GRAY R A;  US5531080-A   MITSUBISHI DENKI KK (MITQ)   HIRAHARA T,  KAWAGUCHI S,  SHIMIZU T,  KAWASAKI K,  MASUDA N,  OGASAWARA S,  KONISHI H,  MARUYAMA H,  SUMIDA Y,  UEYAMA A,  TOYOMA S,  SUZUKI S,  AKAHORI Y