;  WO2004019465-A2 -- US4495002-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ANELLO J G;  US4992380-A   NALCO CHEM CO (NALC)   MORIARTY B E,  HOY W H,  JOHNSON D A,  HICKEY J J,  HOOTS J E;  US5166990-A   PURITAN BENNETT CORP (PURI-Non-standard)   RICCITELLI S D,  SHERN T A,  HOMICK R,  NELSON A,  BANKERT C S,  HUI H K;  US5268092-A   HERC INC (HERC-Non-standard)   EDEN T R;  US5411889-A   NALCO CHEM CO (NALC)   HOOTS J E,  GODFREY M R;  US5506148-A   CIBA CORNING DIAGNOSTICS CORP (CIBA)   MUNKHOLM C;  US5607644-A   OPTICAL SENSORS INC (OPTI-Non-standard)   OLSTEIN A,  FOWLER W,  PRITCHARD J;  US6841387-B2 -- US4495002-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ANELLO J G;  US4495052-A   CORNING GLASS WORKS (CORG)   BREZINSKI D P;  US4988583-A   CANADA MIN NAT DEFENCE (MIND);  CANADIAN GOVERNMENT (CNDG)   WATKINS D S,  DIRCKS K W,  EPP D G;  US4992380-A   NALCO CHEM CO (NALC)   MORIARTY B E,  HOY W H,  JOHNSON D A,  HICKEY J J,  HOOTS J E;  US5166990-A   PURITAN BENNETT CORP (PURI-Non-standard)   RICCITELLI S D,  SHERN T A,  HOMICK R,  NELSON A,  BANKERT C S,  HUI H K;  US5268092-A   HERC INC (HERC-Non-standard)   EDEN T R;  US5300370-A   BALLARD POWER SYSTEMS INC (BLRD)   VOSS H H,  WILKINSON D P,  WASHINGTON K B;  US5411889-A   NALCO CHEM CO (NALC)   HOOTS J E,  GODFREY M R;  US5506148-A   CIBA CORNING DIAGNOSTICS CORP (CIBA)   MUNKHOLM C;  US5607644-A   OPTICAL SENSORS INC (OPTI-Non-standard)   OLSTEIN A,  FOWLER W,  PRITCHARD J;  US6701168-B1   UNIV PENNSYLVANIA (UPEN)   WILSON D F,  VINOGRADOV S A;  US6663997-B2   BALLARD POWER SYSTEMS INC (BLRD)   KRATSCHMAR K W,  LU D,  PASTULA M E,  WANG G G,  PERRY M L,  DONG Z,  MACKIE R N,  MERIDA DONIS W R,  ZHENG R;  WO1995016287-A1   ;  WO2004019465-A3 -- US4495002-A   WESTINGHOUSE ELECTRIC CORP (WESE)   ANELLO J G;  US4992380-A   NALCO CHEM CO (NALC)   MORIARTY B E,  HOY W H,  JOHNSON D A,  HICKEY J J,  HOOTS J E;  US5166990-A   PURITAN BENNETT CORP (PURI-Non-standard)   RICCITELLI S D,  SHERN T A,  HOMICK R,  NELSON A,  BANKERT C S,  HUI H K;  US5268092-A   HERC INC (HERC-Non-standard)   EDEN T R;  US5411889-A   NALCO CHEM CO (NALC)   HOOTS J E,  GODFREY M R;  US5506148-A   CIBA CORNING DIAGNOSTICS CORP (CIBA)   MUNKHOLM C;  US5607644-A   OPTICAL SENSORS INC (OPTI-Non-standard)   OLSTEIN A,  FOWLER W,  PRITCHARD J