WO200113452-A1 -- EP435724-A   PETRO ENERGY CENT (PETR-Non-standard);  SEKIYU SANGYO KASSEI (SEKI-Non-standard);  SHOWA SHELL SEIKIYU KK (SHEL)   YAMASE O,  YOSHIZAWA S,  MIURA T;  EP673074-A1   ROLLS ROYCE PLC (RORO)   GARDNER F J,  DAY M J,  BRANDON N P,  BROWNELL J B;  EP435724-A3   PETRO ENERGY CENT (PETR-Non-standard);  SEKIYU SANGYO KASSEI (SEKI-Non-standard);  SHOWA SHELL SEIKIYU KK (SHEL)   YAMASE O,  YOSHIZAWA S,  MIURA T;  EP435724-B1   PETRO ENERGY CENT (PETR-Non-standard);  SEKIYU SANGYO KASSEI (SEKI-Non-standard);  SHOWA SHELL SEIKIYU KK (SHEL)   YAMASE O,  YOSHIZAWA S,  MIURA T;  EP673074-B1   ROLLS ROYCE PLC (RORO)   GARDNER F J,  DAY M J,  BRANDON N P,  BROWNELL J B;  JP08048501-A   ;  US4894297-A   WESTINGHOUSE ELECTRIC CORP (WESE)   SINGH P,  RUKA R J,  GEORGE R A;  US5302470-A   OSAKA GAS CO LTD (OSAG);  EP1228547-A1 -- DE19734051-A1   MITSUBISHI DENKI KK (MITQ)   MATSUMURA M,  SHINOKI T;  DE19734051-C2   MITSUBISHI DENKI KK (MITQ)   MATSUMURA M,  SHINOKI T;  US5302470-A   OSAKA GAS CO LTD (OSAG);  US6841279-B1 -- EP435724-A   PETRO ENERGY CENT (PETR-Non-standard);  SEKIYU SANGYO KASSEI (SEKI-Non-standard);  SHOWA SHELL SEIKIYU KK (SHEL)   YAMASE O,  YOSHIZAWA S,  MIURA T;  EP673074-A1   ROLLS ROYCE PLC (RORO)   GARDNER F J,  DAY M J,  BRANDON N P,  BROWNELL J B;  JP08048501-A   ;  US3488226-A   INST GAS TECHNOLOGY (IGTE);  US5034287-A   INT FUEL CELLS CORP (ITFU)   KUNZ H R;  US5198310-A   INST GAS TECHNOLOGY (IGTE)   FLEMING D K,  REX R C;  US5302470-A   OSAKA GAS CO LTD (OSAG);  EP1228547-B1 -- DE19734051-A1   MITSUBISHI DENKI KK (MITQ)   MATSUMURA M,  SHINOKI T;  EP435724-A   PETRO ENERGY CENT (PETR-Non-standard);  SEKIYU SANGYO KASSEI (SEKI-Non-standard);  SHOWA SHELL SEIKIYU KK (SHEL)   YAMASE O,  YOSHIZAWA S,  MIURA T;  EP673074-A1   ROLLS ROYCE PLC (RORO)   GARDNER F J,  DAY M J,  BRANDON N P,  BROWNELL J B;  US5302470-A   OSAKA GAS CO LTD (OSAG);  JP5248729-B2 -- JP88119163-A   ;  JP89009801-A   ;  JP94104002-A   ;  JP95230816-A   ;  JP95272742-A   ;  JP96048501-A   ;  JP99025997-A   ;  EP1228547-B9 -- DE19734051-A1   MITSUBISHI DENKI KK (MITQ)   MATSUMURA M,  SHINOKI T;  EP435724-A   PETRO ENERGY CENT (PETR-Non-standard);  SEKIYU SANGYO KASSEI (SEKI-Non-standard);  SHOWA SHELL SEIKIYU KK (SHEL)   YAMASE O,  YOSHIZAWA S,  MIURA T;  EP673074-A1   ROLLS ROYCE PLC (RORO)   GARDNER F J,  DAY M J,  BRANDON N P,  BROWNELL J B;  US5302470-A   OSAKA GAS CO LTD (OSAG)