EP716464-A -- EP125846-A   BRITISH GAS CORP (GASC)   PUXLEY D C,  MCKENZIE D,  BANKS R G S,  SHEPPERD C;  EP173904-A   ENERGY RES CORP (ENER-Non-standard);  MITSUBISHI DENKI KK (MITQ)   PATEL P,  DHARIA D,  MARU H;  EP360554-A   BRITISH GAS PLC (GASC)   WILLIAMS A,  WILSON J D,  WRAGG R D,  JONES S D,  REYNOLDS T J,  KOMODROMOS C;  JP3245850-A   HITACHI LTD (HITA);  GB2295920-A -- EP459940-A   INST GAS TECHNOLOGY (IGTE)   SCHORA F C,  MARIANOWSK L G,  PETRI R J,  LAWSON M G;  GB1179033-A   ATLANTIC RICHFIELD CO (ATLF);  GB2222963-A   BRITISH GAS PLC (GASC)   WILLIAMS A,  WILSON J D,  WRAGG R D,  JONES S D,  REYNOLDS T J,  KOMODROMOS C;  US3488226-A   INST GAS TECHNOLOGY (IGTE);  US4454207-A   US DEPT ENERGY (USAT)   FRAIOLI A V,  YOUNG J E;  US4467050-A   ENERGY RES CORP (ENER-Non-standard)   PATEL P,  DHARIA D,  MARU H;  US4774152-A   MITSUBISHI DENKI KK (MITQ);  EP716464-A1 -- EP125846-A   BRITISH GAS CORP (GASC)   PUXLEY D C,  MCKENZIE D,  BANKS R G S,  SHEPPERD C;  EP173904-A   ENERGY RES CORP (ENER-Non-standard);  MITSUBISHI DENKI KK (MITQ)   PATEL P,  DHARIA D,  MARU H;  EP360554-A   BRITISH GAS PLC (GASC)   WILLIAMS A,  WILSON J D,  WRAGG R D,  JONES S D,  REYNOLDS T J,  KOMODROMOS C;  GB2222963-A   BRITISH GAS PLC (GASC)   WILLIAMS A,  WILSON J D,  WRAGG R D,  JONES S D,  REYNOLDS T J,  KOMODROMOS C;  JP3245850-A   HITACHI LTD (HITA);  US5622790-A -- EP125846-A   BRITISH GAS CORP (GASC)   PUXLEY D C,  MCKENZIE D,  BANKS R G S,  SHEPPERD C;  EP173904-A   ENERGY RES CORP (ENER-Non-standard);  MITSUBISHI DENKI KK (MITQ)   PATEL P,  DHARIA D,  MARU H;  EP360554-A   BRITISH GAS PLC (GASC)   WILLIAMS A,  WILSON J D,  WRAGG R D,  JONES S D,  REYNOLDS T J,  KOMODROMOS C;  EP459940-A   INST GAS TECHNOLOGY (IGTE)   SCHORA F C,  MARIANOWSK L G,  PETRI R J,  LAWSON M G;  GB1179033-A   ATLANTIC RICHFIELD CO (ATLF);  GB2222963-A   BRITISH GAS PLC (GASC)   WILLIAMS A,  WILSON J D,  WRAGG R D,  JONES S D,  REYNOLDS T J,  KOMODROMOS C;  US3488226-A   INST GAS TECHNOLOGY (IGTE);  US4454207-A   US DEPT ENERGY (USAT)   FRAIOLI A V,  YOUNG J E;  US4467050-A   ENERGY RES CORP (ENER-Non-standard)   PATEL P,  DHARIA D,  MARU H;  US4774152-A   MITSUBISHI DENKI KK (MITQ);  GB2295920-B -- EP459940-A   INST GAS TECHNOLOGY (IGTE)   SCHORA F C,  MARIANOWSK L G,  PETRI R J,  LAWSON M G;  GB1179033-A   ATLANTIC RICHFIELD CO (ATLF);  GB2222963-A   BRITISH GAS PLC (GASC)   WILLIAMS A,  WILSON J D,  WRAGG R D,  JONES S D,  REYNOLDS T J,  KOMODROMOS C;  US3488226-A   INST GAS TECHNOLOGY (IGTE);  US4454207-A   US DEPT ENERGY (USAT)   FRAIOLI A V,  YOUNG J E;  US4467050-A   ENERGY RES CORP (ENER-Non-standard)   PATEL P,  DHARIA D,  MARU H;  US4774152-A   MITSUBISHI DENKI KK (MITQ);  EP716464-B1 -- EP125846-A   BRITISH GAS CORP (GASC)   PUXLEY D C,  MCKENZIE D,  BANKS R G S,  SHEPPERD C;  EP173904-A   ENERGY RES CORP (ENER-Non-standard);  MITSUBISHI DENKI KK (MITQ)   PATEL P,  DHARIA D,  MARU H;  EP360554-A   BRITISH GAS PLC (GASC)   WILLIAMS A,  WILSON J D,  WRAGG R D,  JONES S D,  REYNOLDS T J,  KOMODROMOS C;  JP3245850-A   HITACHI LTD (HITA);  JP2980834-B2 -- JP59230641-A   BRITISH GAS CORP (GASC)   PUXLEY D C,  MCKENZIE D,  BANKS R G S,  SHEPPERD C;  JP61058174-A   ENERGY RES CORP (ENER-Non-standard);  MITSUBISHI DENKI KK (MITQ)   PATEL P,  DHARIA D,  MARU H;  JP93085595-B2   BRITISH GAS PLC (GASC)   WILLIAMS A,  WILSON J D,  WRAGG R D,  JONES S D,  REYNOLDS T J,  KOMODROMOS C