EP734086-A1 -- EP173904-A   ENERGY RES CORP (ENER-Non-standard);  MITSUBISHI DENKI KK (MITQ)   PATEL P,  DHARIA D,  MARU H;  EP414573-A   TONEN CORP (TOFU);  PETRO ENERGY CENT FOUND (PETR-Non-standard);  SEKIYU SANGYO KASSEIKA C (SEKI-Non-standard)   SAIAI A,  YOKOYAMA Y,  SAKURADA S;  EP414573-B1   TONEN CORP (TOFU);  PETRO ENERGY CENT FOUND (PETR-Non-standard);  SEKIYU SANGYO KASSEIKA C (SEKI-Non-standard)   SAIAI A,  YOKOYAMA Y,  SAKURADA S;  GB1179033-A   ATLANTIC RICHFIELD CO (ATLF);  JP61279067-A   ;  US4774152-A   MITSUBISHI DENKI KK (MITQ)   MATSUMURA M,  OKADA T,  KOTOGAMI Y;  US4894297-A   WESTINGHOUSE ELECTRIC CORP (WESE)   SINGH P,  RUKA R J,  GEORGE R A;  US5348814-A   MATSUSHITA ELEC IND CO LTD (MATU)   GAMO T,  HATOH K,  YASUMOTO E,  NIIKURA J,  HADO K,  ADACHI K;  US5705288-A -- US4810595-A   HITACHI LTD (HITA);  NEW ENERGY DEV ORGANISATION (NEWE-Non-standard)   TAKEUCHI M,  KAHARA T,  OKADA H,  IWAMOTO K,  IWASE Y,  KAMO Y,  MITSUGI K;  US4898792-A   WESTINGHOUSE ELECTRIC CORP (WESE)   SINGH P,  RUKA R J,  GEORGE R A;  US5246791-A   JOHNSON MATTHEY PLC (JOHO)   FISHER J M,  BENNETT P S;  US5527631-A   WESTINGHOUSE ELECTRIC CORP (WESE)   SINGH P,  SHOCKLING L A,  GEORGE R A,  BASEL R A;  EP734086-B1 -- EP173904-A   ENERGY RES CORP (ENER-Non-standard);  MITSUBISHI DENKI KK (MITQ)   PATEL P,  DHARIA D,  MARU H;  EP414573-A   TONEN CORP (TOFU);  PETRO ENERGY CENT FOUND (PETR-Non-standard);  SEKIYU SANGYO KASSEIKA C (SEKI-Non-standard)   SAIAI A,  YOKOYAMA Y,  SAKURADA S;  GB1179033-A   ATLANTIC RICHFIELD CO (ATLF);  JP61279067-A   ;  US4774152-A   MITSUBISHI DENKI KK (MITQ)   MATSUMURA M,  OKADA T,  KOTOGAMI Y;  US4894297-A   WESTINGHOUSE ELECTRIC CORP (WESE)   SINGH P,  RUKA R J,  GEORGE R A;  US5348814-A   MATSUSHITA ELEC IND CO LTD (MATU)   GAMO T,  HATOH K,  YASUMOTO E,  NIIKURA J,  HADO K,  ADACHI K;  JP3831004-B2 -- JP03225772-A   ;  JP04265156-A   ;  JP05192574-A   ;  JP06339633-A   ;  JP61024170-A   MITSUBISHI DENKI KK (MITQ)   MATSUMURA M,  YOSHIMURA M,  URUSHIBATA H;  JP74010434-B