WO9638870-A1 -- US5147735-A   OSAKA GAS CO LTD (OSAG)   IPPOMMATSU M,  HIRANO A,  SASAKI H;  US5589285-A -- EP399833-A   STANDARD OIL CO OHIO (STAH)   CABLE T L,  MAZANEC T J,  FRYE J G;  US3578502-A   CIE FR RAFFINAGE SA (COFR);  US4088501-A   PILKINGTON BROS LTD (PIHL);  US4317865-A   UNITED TECHNOLOGIES CORP (UNAC)   TROCCIOLA J C,  SCHROLL C R,  VINE R W;  US4331565-A   GENERAL MOTORS CORP (GENK)   SCHAEFER C F,  BEDFORD R E;  US4476246-A   GRACE & CO W R (GRAC)   KIM G,  ERNEST M V;  US4490444-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ISENBERG A O;  US4517260-A   MITSUBISHI ELECTRIC CORP (MITQ)   MITSUTA K;  US4547437-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ISENBERG A O,  RUKA R J,  ZYMBOLY G E;  US4582766-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ISENBERG A O,  ZYMBOLY G E;  US4590090-A   GENERAL ELECTRIC CO (GENE)   SIEMERS P A,  KRYSTYNIAK C W;  US4597170-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ISENBERG A O;  US4598467-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ISENBERG A O,  RUKA R J;  US4702971-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ISENBERG A O;  US4770955-A   STANDARD OIL CO OHIO (STAH)   RUHL R C;  US4812329-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ISENBERG A O;  US5028036-A   ;  US5147735-A   OSAKA GAS CO LTD (OSAG)   IPPOMMATSU M,  HIRANO A,  SASAKI H;  US5177035-A   STEMCOR CORP (STEM-Non-standard)   GEE A W,  KRISHNASWA P,  SANE A Y;  US5240480-A   AIR PROD & CHEM INC (AIRP)   THOROGOOD R M,  SRINIVASAN R,  YEE T F,  DRAKE M P;  US5277995-A   ;  US5411767-A   NGK INSULATORS LTD (NIGA)   SOMA T,  KAWASAKI S,  ITO S,  YOSHIOKA K;  US5445903-A   TECHNOLOGY MANAGEMENT INC (TECH-Non-standard)   CABLE T L,  PETRIK M A;  EP839394-A1 -- US4582766-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ISENBERG A O,  ZYMBOLY G E;  US4702971-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ISENBERG A O;  US5021304-A   WESTINGHOUSE ELECTRIC CORP (WESE)   RUKA F J,  SPENGLER C J;  US5350641-A   RISOE FORSKNINGSCENTER (RISO-Non-standard)   MOGENSEN M,  KINDL B;  AU703014-B -- US5147735-A   OSAKA GAS CO LTD (OSAG)   IPPOMMATSU M,  HIRANO A,  SASAKI H