;  WO2003008329-A1 -- US4927857-A   ENGELHARD MINERALS CORP (ENGH);  US5763113-A   GENERAL MOTORS CORP (GENK)   MELTSER M A,  GROT S A;  US5993619-A   NIAGARA MOHAWK POWER CORP (NIAG-Non-standard)   BLOOMFIELD D P,  RABE A N;  US6048472-A   AIR PROD & CHEM INC (AIRP)   NATARAJ S,  MOORE R B,  RUSSEK S L;  US6875246-B2 -- DE4201632-A1   ;  EP1066876-A1   GENERAL MOTORS CORP (GENK)   KESKULA D H,  DOAN T M,  CLINGERMAN B J;  EP977293-A2   GENERAL MOTORS CORP (GENK)   SKALA G W,  HART-PREDMORE D J,  PETTIT W H,  BORUP R L;  US3134697-A   ;  US4650722-A   ;  US4927857-A   ENGELHARD MINERALS CORP (ENGH);  US5272017-A   GENERAL MOTORS CORP (GENK)   SWATHIRAJAN S,  MIKHAIL Y M;  US5316871-A   GENERAL MOTORS CORP (GENK)   SWATHIRAJAN S,  MIKHAIL Y M;  US5478662-A   SIEMENS AG (SIEI)   STRASSER K;  US5543238-A   SIEMENS AG (SIEI)   STRASSER K;  US5763113-A   GENERAL MOTORS CORP (GENK)   MELTSER M A,  GROT S A;  US5993619-A   NIAGARA MOHAWK POWER CORP (NIAG-Non-standard)   BLOOMFIELD D P,  RABE A N;  US6007931-A   INT FUEL CELLS CORP (ITFU)   FULLER T F,  MARGIOTT P R,  VAN DINE L L;  US6013385-A   EMPRISE CORP (EMPR-Non-standard)   DUBOSE R A;  US6048472-A   AIR PROD & CHEM INC (AIRP)   NATARAJ S,  MOORE R B,  RUSSEK S L;  US6077620-A   GENERAL MOTORS CORP (GENK)   PETTIT W H;  US6099484-A   MERCURY DIAGNOSTICS INC (MERC-Non-standard)   DOUGLAS J S,  ROE J N,  RADWANSKI R,  DUCHON B G;  US6132689-A   GENERAL MOTORS CORP (GENK)   SKALA G W,  BRUNDAGE M A,  BORUP R L,  PETTIT W H,  STUKEY K,  HART-PREDMORE D J,  FAIRCHOK J;  US6159626-A   GENERAL MOTORS CORP (GENK)   KESKULA D H,  DOAN T M,  CLINGERMAN B J;  US20020031695-A1   ;  US20030019363-A1   ;  US20030138680-A1   ;  US20040179998-A1   ;  US6485854-B1   GENERAL MOTORS CORP (GENK)   GROVER T T,  FORTE J R;  US6579637-B1   GENERAL MOTORS CORP (GENK)   SAVAGE D R,  GROVER T T,  FORTE J R,  JENSEN E K;  DE10297048-B4 -- DE19908905-A1   DAIMLERCHRYSLER AG (DAIM)   AUTENRIETH R,  DOCTER A,  LAMM A,  POSCHMANN T,  WIELAND S;  DE4201632-C2   ;  WO2001048849-A1   ;  WO1999067829-A2