WO200284099-A1 -- EP837238-A2   ;  EP1158590-A2   XCELLSIS GMBH (XCEL-Non-standard)   SOHMER P;  EP1162354-A2   FILTERWERK MANN & HUMMEL GMBH (FILW)   FUESSER R;  EP1195830-A2   NISSAN MOTOR CO LTD (NSMO)   ARAMAKI K;  EP837238-B1   ;  JP09026177-A   ;  US5792247-A   DONALDSON CO INC (DOND)   GILLINGHAM G R,  RISCH D T,  TOKAR J C,  WAGNER W M,  MATTHYS B A,  STEINBRUECK E A;  US20010049036-A1   ;  US2002150806-A1 -- US5493080-A   VOLVO AB (VOLV)   MOSS H;  US20020150805-A1   ;  US20020157359-A1   ;  US6171072-B1   SCION VALLEY INC (SCIO-Non-standard)   WEST J E,  FOWLER R H;  US6361590-B1   HONEYWELL INC (HONE)   GILBERT D L,  GATCHELL S M;  US2002157359-A1 -- US3812370-A   ENVIRONMENT/ONE CORP (ENVI-Non-standard);  US3847672-A   UNITED AIRCRAFT CORP (UNAC);  US3861894-A   BIO-DYNAMICS INC (BIOD-Non-standard);  US3925043-A   ENVIRONMENT/ONE (ENVI-Non-standard)   MATRONE J L,  LYONS W E;  US4080791-A   EXXON RES & ENG CO (ESSO)   NADLER M,  CAHN R P;  US4129426-A   FLEX AKE WENNBERG (FLEX-Non-standard);  WENNBERG F A AB (WENN-Non-standard);  FLEX AKE WENNBERG A (FLEX-Non-standard);  US4595642-A   MITSUBISHI HEAVY IND CO LTD (MITO)   NAKANISHI K,  TANABE S,  IZUMI J;  US4737173-A   AMWAY CORP (AMWA-Non-standard)   KUDIRKA P J,  HAMILTON R W,  GROCHOSKI G T;  US4909815-A   INT AIR FILTER INC (ITAI-Non-standard)   MEYER R R;  US5013617-A   INT FUEL CELLS CORP (ITFU)   SCHEFFLER G W;  US5139546-A   NOVOBILSKI C G (NOVO-Individual)   NOVOBILSKI C G;  US5156925-A   ALCAN INT LTD (ALCN)   LAPP S P;  US5189092-A   KOSLOW TECHN CORP (KOSL-Non-standard)   KOSLOW E E;  US5221586-A   ISHIKAWAJIMA HARIMA JUKOGYO KK (ISHI);  TOKYO GAS CO LTD (TOLG);  OSAKA GAS CO LTD (OSAG);  TOHO GAS KK (TOHG)   MORIMOTO H,  HATO,  HATORI S,  KOBAYASHI K,  UEMATSU H,  HIKITA T,  SHINOZAKI K,  NAKAGAWA S;  US5331037-A   KOSLOW TECHN CORP (KOSL-Non-standard)   KOSLOW E E;  US5372617-A   CHARLES STARK DRAPER LAB INC (DRAS)   KERREBROCK P A,  WAYNE A S;  US5641031-A   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  US5646852-A   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  US5662184-A   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  US5672399-A   DONALDSON CO INC (DOND)   DUDREY D J,  KAHLBAUGH B;  US5792227-A   DONALDSON CO INC (DOND)   KAHLBAUGH B E,  HERMAN J T,  REINHART S B,  DUDREY D J;  US5792247-A   DONALDSON CO INC (DOND)   GILLINGHAM G R,  RISCH D T,  TOKAR J C,  WAGNER W M,  MATTHYS B A,  STEINBRUECK E A;  US5794732-A   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  US5837393-A   HONDA GIKEN KOGYO KK (HOND)   OKAMOTO T;  US5853441-A   GROEN D D (GROE-Individual);  WITTE K W (WITT-Individual)   GROEN D D,  WITTE K W;  US5944878-A   LINDHE KONSULT & FOERVALTNINGS AB CURT (LIND-Non-standard)   LINDHE C;  US5981096-A   DAIMLER-BENZ AG (DAIM)   LAMM A,  URBAN P,  HORNBURG G;  US6007930-A   FORD GLOBAL TECHNOLOGIES INC (FORD)   ADAMS J A,  SULEK M S,  SALOKA G S;  US6013385-A   EMPRISE CORP (EMPR-Non-standard)   DUBOSE R A;  US6033301-A   FUJI ELECTRIC CO LTD (FJIE)   SUWA N;  US6057051-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   UCHIDA M,  FUKUOKA Y,  SUGAWARA Y,  EDA N;  US6074769-A   BINSMAIER H (BINS-Individual)   JOHNSSEN W G;  US6124052-A   TOYODA JIDOSHOKKI SEISAKUSHO KK (TOYX)   KATOH H,  KUBO H,  FUJII T;  US6152996-A   AIR-MAZE CORP (AIRM-Non-standard)   LINNERSTEN S B,  FLEMMING R J;  US20010049036-A1   ;  US6190432-B1   DONALDSON CO INC (DOND)   GIESEKE S S,  FINNERTY C J;  US6284397-B1   BALLARD POWER SYSTEMS INC (BLRD)   BARTON R H;  US6296957-B1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   GRAAGE K;  US6309769-B1   PLUG POWER INC (PLUG-Non-standard)   HAUG A T;  US6316134-B1   BALLARD GENERATION SYSTEMS INC (BALL-Non-standard)   COWNDEN R,  EICHE M,  LOUIE C R,  WATKINS D S;  US6321637-B1   HONEYWELL INT INC (HONE)   SHANKS A E,  MONNENS P J,  BAHN R R;  US6432177-B1   DONALDSON CO INC (DOND)   DALLAS A J,  GOGINS M A,  GRAHAM K M,  ADAMEK D E,  SKUSTER R;  EP1381769-A1 -- EP957026-A2   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   GRAAGE K;  US4129426-A   FLEX AKE WENNBERG (FLEX-Non-standard);  WENNBERG F A AB (WENN-Non-standard);  FLEX AKE WENNBERG A (FLEX-Non-standard);  US4737173-A   AMWAY CORP (AMWA-Non-standard)   KUDIRKA P J,  HAMILTON R W,  GROCHOSKI G T;  US5944878-A   LINDHE KONSULT & FOERVALTNINGS AB CURT (LIND-Non-standard)   LINDHE C;  US6013385-A   EMPRISE CORP (EMPR-Non-standard)   DUBOSE R A;  US6780534-B2 -- US6179890-B1   DONALDSON CO INC (DOND)   RAMOS T M,  STEINBRUECK E A,  GIESEKE S S,  FINNERTY C J,  BISHOP W R W;  US6432177-B1   DONALDSON CO INC (DOND)   DALLAS A J,  GOGINS M A,  GRAHAM K M,  ADAMEK D E,  SKUSTER R;  EP677417-A1   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  EP837238-A2   ;  EP1158590-A2   XCELLSIS GMBH (XCEL-Non-standard)   SOHMER P;  EP1162354-A2   FILTERWERK MANN & HUMMEL GMBH (FILW)   FUESSER R;  EP1195830-A2   NISSAN MOTOR CO LTD (NSMO)   ARAMAKI K;  GB2250130-A   VICKERS SHIPBUILDING & ENG (VICS);  CJBD LTD (CJBD-Non-standard)   PALMER I,  SEYMOUR C M,  DAMS R A J;  JP09026177-A   ;  US3847672-A   UNITED AIRCRAFT CORP (UNAC);  US4080791-A   EXXON RES & ENG CO (ESSO)   NADLER M,  CAHN R P;  US4595642-A   MITSUBISHI HEAVY IND CO LTD (MITO)   NAKANISHI K,  TANABE S,  IZUMI J;  US4737173-A   AMWAY CORP (AMWA-Non-standard)   KUDIRKA P J,  HAMILTON R W,  GROCHOSKI G T;  US5013617-A   INT FUEL CELLS CORP (ITFU)   SCHEFFLER G W;  US5156925-A   ALCAN INT LTD (ALCN)   LAPP S P;  US5189092-A   KOSLOW TECHN CORP (KOSL-Non-standard)   KOSLOW E E;  US5221586-A   ISHIKAWAJIMA HARIMA JUKOGYO KK (ISHI);  TOKYO GAS CO LTD (TOLG);  OSAKA GAS CO LTD (OSAG);  TOHO GAS KK (TOHG)   MORIMOTO H,  HATO,  HATORI S,  KOBAYASHI K,  UEMATSU H,  HIKITA T,  SHINOZAKI K,  NAKAGAWA S;  US5331037-A   KOSLOW TECHN CORP (KOSL-Non-standard)   KOSLOW E E;  US5366821-A   BALLARD POWER SYSTEMS INC (BLRD)   MERRITT R D,  BLAIR J D;  US5372617-A   CHARLES STARK DRAPER LAB INC (DRAS)   KERREBROCK P A,  WAYNE A S;  US5458095-A   ENERGY REDUCTIONS SYSTEMS INC (ENER-Non-standard)   LITTLEFIELD D C,  POST D R;  US5626820-A   KINKEAD D A (KINK-Individual);  REZUKE R W (REZU-Individual);  HIGLEY J K (HIGL-Individual)   REZUKE R W,  KINKEAD D A,  HIGLEY J K;  US5641031-A   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  US5646852-A   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  US5662184-A   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  US5792247-A   DONALDSON CO INC (DOND)   GILLINGHAM G R,  RISCH D T,  TOKAR J C,  WAGNER W M,  MATTHYS B A,  STEINBRUECK E A;  US5794732-A   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  US5837393-A   HONDA GIKEN KOGYO KK (HOND)   OKAMOTO T;  US5944878-A   LINDHE KONSULT & FOERVALTNINGS AB CURT (LIND-Non-standard)   LINDHE C;  US5981096-A   DAIMLER-BENZ AG (DAIM)   LAMM A,  URBAN P,  HORNBURG G;  US6007930-A   FORD GLOBAL TECHNOLOGIES INC (FORD)   ADAMS J A,  SULEK M S,  SALOKA G S;  US6013385-A   EMPRISE CORP (EMPR-Non-standard)   DUBOSE R A;  US6057051-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   UCHIDA M,  FUKUOKA Y,  SUGAWARA Y,  EDA N;  US6074769-A   BINSMAIER H (BINS-Individual)   JOHNSSEN W G;  US6124052-A   TOYODA JIDOSHOKKI SEISAKUSHO KK (TOYX)   KATOH H,  KUBO H,  FUJII T;  US6152996-A   AIR-MAZE CORP (AIRM-Non-standard)   LINNERSTEN S B,  FLEMMING R J;  US20010049036-A1   ;  US6190432-B1   DONALDSON CO INC (DOND)   GIESEKE S S,  FINNERTY C J;  US6284397-B1   BALLARD POWER SYSTEMS INC (BLRD)   BARTON R H;  US6296957-B1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   GRAAGE K;  US6309769-B1   PLUG POWER INC (PLUG-Non-standard)   HAUG A T;  US6316134-B1   BALLARD GENERATION SYSTEMS INC (BALL-Non-standard)   COWNDEN R,  EICHE M,  LOUIE C R,  WATKINS D S;  US6420059-B1   CALIFORNIA INST OF TECHNOLOGY (CALY)   SURAMPUDI S,  FRANK H A,  NARAYANAN S R,  CHUN W,  JEFFRIES-NAKAMURA B,  KINDLER A,  HALPERT G;  US6436562-B1   EMPRISE TECHNOLOGY ASSOC CORP (EMPR-Non-standard)   DUBOSE R A;  WO2001048850-A1   ;  US6783881-B2 -- EP677417-A1   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  EP837238-A2   ;  EP1158590-A2   XCELLSIS GMBH (XCEL-Non-standard)   SOHMER P;  EP1162354-A2   FILTERWERK MANN & HUMMEL GMBH (FILW)   FUESSER R;  EP1195830-A2   NISSAN MOTOR CO LTD (NSMO)   ARAMAKI K;  GB2250130-A   VICKERS SHIPBUILDING & ENG (VICS);  CJBD LTD (CJBD-Non-standard)   PALMER I,  SEYMOUR C M,  DAMS R A J;  JP09026177-A   ;  US3847672-A   UNITED AIRCRAFT CORP (UNAC);  US4080791-A   EXXON RES & ENG CO (ESSO)   NADLER M,  CAHN R P;  US4595642-A   MITSUBISHI HEAVY IND CO LTD (MITO)   NAKANISHI K,  TANABE S,  IZUMI J;  US4737173-A   AMWAY CORP (AMWA-Non-standard)   KUDIRKA P J,  HAMILTON R W,  GROCHOSKI G T;  US5013617-A   INT FUEL CELLS CORP (ITFU)   SCHEFFLER G W;  US5156925-A   ALCAN INT LTD (ALCN)   LAPP S P;  US5189092-A   KOSLOW TECHN CORP (KOSL-Non-standard)   KOSLOW E E;  US5221586-A   ISHIKAWAJIMA HARIMA JUKOGYO KK (ISHI);  TOKYO GAS CO LTD (TOLG);  OSAKA GAS CO LTD (OSAG);  TOHO GAS KK (TOHG)   MORIMOTO H,  HATO,  HATORI S,  KOBAYASHI K,  UEMATSU H,  HIKITA T,  SHINOZAKI K,  NAKAGAWA S;  US5331037-A   KOSLOW TECHN CORP (KOSL-Non-standard)   KOSLOW E E;  US5366821-A   BALLARD POWER SYSTEMS INC (BLRD)   MERRITT R D,  BLAIR J D;  US5372617-A   CHARLES STARK DRAPER LAB INC (DRAS)   KERREBROCK P A,  WAYNE A S;  US5458095-A   ENERGY REDUCTIONS SYSTEMS INC (ENER-Non-standard)   LITTLEFIELD D C,  POST D R;  US5493080-A   VOLVO AB (VOLV)   MOSS H;  US5626820-A   KINKEAD D A (KINK-Individual);  REZUKE R W (REZU-Individual);  HIGLEY J K (HIGL-Individual)   REZUKE R W,  KINKEAD D A,  HIGLEY J K;  US5641031-A   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  US5646852-A   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  US5662184-A   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  US5792247-A   DONALDSON CO INC (DOND)   GILLINGHAM G R,  RISCH D T,  TOKAR J C,  WAGNER W M,  MATTHYS B A,  STEINBRUECK E A;  US5794732-A   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  US5837393-A   HONDA GIKEN KOGYO KK (HOND)   OKAMOTO T;  US5944878-A   LINDHE KONSULT & FOERVALTNINGS AB CURT (LIND-Non-standard)   LINDHE C;  US5981096-A   DAIMLER-BENZ AG (DAIM)   LAMM A,  URBAN P,  HORNBURG G;  US6007930-A   FORD GLOBAL TECHNOLOGIES INC (FORD)   ADAMS J A,  SULEK M S,  SALOKA G S;  US6013385-A   EMPRISE CORP (EMPR-Non-standard)   DUBOSE R A;  US6057051-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   UCHIDA M,  FUKUOKA Y,  SUGAWARA Y,  EDA N;  US6074769-A   BINSMAIER H (BINS-Individual)   JOHNSSEN W G;  US6124052-A   TOYODA JIDOSHOKKI SEISAKUSHO KK (TOYX)   KATOH H,  KUBO H,  FUJII T;  US6152996-A   AIR-MAZE CORP (AIRM-Non-standard)   LINNERSTEN S B,  FLEMMING R J;  US20010049036-A1   ;  US20020150805-A1   ;  US20020157359-A1   ;  US6171072-B1   SCION VALLEY INC (SCIO-Non-standard)   WEST J E,  FOWLER R H;  US6190432-B1   DONALDSON CO INC (DOND)   GIESEKE S S,  FINNERTY C J;  US6284397-B1   BALLARD POWER SYSTEMS INC (BLRD)   BARTON R H;  US6296957-B1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   GRAAGE K;  US6309769-B1   PLUG POWER INC (PLUG-Non-standard)   HAUG A T;  US6316134-B1   BALLARD GENERATION SYSTEMS INC (BALL-Non-standard)   COWNDEN R,  EICHE M,  LOUIE C R,  WATKINS D S;  US6361590-B1   HONEYWELL INC (HONE)   GILBERT D L,  GATCHELL S M;  US6420059-B1   CALIFORNIA INST OF TECHNOLOGY (CALY)   SURAMPUDI S,  FRANK H A,  NARAYANAN S R,  CHUN W,  JEFFRIES-NAKAMURA B,  KINDLER A,  HALPERT G;  US6432177-B1   DONALDSON CO INC (DOND)   DALLAS A J,  GOGINS M A,  GRAHAM K M,  ADAMEK D E,  SKUSTER R;  US6436562-B1   EMPRISE TECHNOLOGY ASSOC CORP (EMPR-Non-standard)   DUBOSE R A;  WO2001048850-A1   ;  US6797027-B2 -- JP09026177-A   ;  US3812370-A   ENVIRONMENT/ONE CORP (ENVI-Non-standard);  US3861894-A   BIO-DYNAMICS INC (BIOD-Non-standard);  US3925043-A   ENVIRONMENT/ONE (ENVI-Non-standard)   MATRONE J L,  LYONS W E;  US4129426-A   FLEX AKE WENNBERG (FLEX-Non-standard);  WENNBERG F A AB (WENN-Non-standard);  FLEX AKE WENNBERG A (FLEX-Non-standard);  US4737173-A   AMWAY CORP (AMWA-Non-standard)   KUDIRKA P J,  HAMILTON R W,  GROCHOSKI G T;  US4909815-A   INT AIR FILTER INC (ITAI-Non-standard)   MEYER R R;  US5139546-A   NOVOBILSKI C G (NOVO-Individual)   NOVOBILSKI C G;  US5672399-A   DONALDSON CO INC (DOND)   DUDREY D J,  KAHLBAUGH B;  US5792227-A   DONALDSON CO INC (DOND)   KAHLBAUGH B E,  HERMAN J T,  REINHART S B,  DUDREY D J;  US5853441-A   GROEN D D (GROE-Individual);  WITTE K W (WITT-Individual)   GROEN D D,  WITTE K W;  US6033301-A   FUJI ELECTRIC CO LTD (FJIE)   SUWA N;  US6321637-B1   HONEYWELL INT INC (HONE)   SHANKS A E,  MONNENS P J,  BAHN R R;  EP677417-A1   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  EP837238-A2   ;  EP1158590-A2   XCELLSIS GMBH (XCEL-Non-standard)   SOHMER P;  EP1162354-A2   FILTERWERK MANN & HUMMEL GMBH (FILW)   FUESSER R;  EP1195830-A2   NISSAN MOTOR CO LTD (NSMO)   ARAMAKI K;  GB2250130-A   VICKERS SHIPBUILDING & ENG (VICS);  CJBD LTD (CJBD-Non-standard)   PALMER I,  SEYMOUR C M,  DAMS R A J;  US3847672-A   UNITED AIRCRAFT CORP (UNAC);  US4080791-A   EXXON RES & ENG CO (ESSO)   NADLER M,  CAHN R P;  US4595642-A   MITSUBISHI HEAVY IND CO LTD (MITO)   NAKANISHI K,  TANABE S,  IZUMI J;  US5013617-A   INT FUEL CELLS CORP (ITFU)   SCHEFFLER G W;  US5156925-A   ALCAN INT LTD (ALCN)   LAPP S P;  US5189092-A   KOSLOW TECHN CORP (KOSL-Non-standard)   KOSLOW E E;  US5221586-A   ISHIKAWAJIMA HARIMA JUKOGYO KK (ISHI);  TOKYO GAS CO LTD (TOLG);  OSAKA GAS CO LTD (OSAG);  TOHO GAS KK (TOHG)   MORIMOTO H,  HATO,  HATORI S,  KOBAYASHI K,  UEMATSU H,  HIKITA T,  SHINOZAKI K,  NAKAGAWA S;  US5331037-A   KOSLOW TECHN CORP (KOSL-Non-standard)   KOSLOW E E;  US5372617-A   CHARLES STARK DRAPER LAB INC (DRAS)   KERREBROCK P A,  WAYNE A S;  US5641031-A   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  US5646852-A   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  US5662184-A   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  US5792247-A   DONALDSON CO INC (DOND)   GILLINGHAM G R,  RISCH D T,  TOKAR J C,  WAGNER W M,  MATTHYS B A,  STEINBRUECK E A;  US5794732-A   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  US5837393-A   HONDA GIKEN KOGYO KK (HOND)   OKAMOTO T;  US5944878-A   LINDHE KONSULT & FOERVALTNINGS AB CURT (LIND-Non-standard)   LINDHE C;  US5981096-A   DAIMLER-BENZ AG (DAIM)   LAMM A,  URBAN P,  HORNBURG G;  US6007930-A   FORD GLOBAL TECHNOLOGIES INC (FORD)   ADAMS J A,  SULEK M S,  SALOKA G S;  US6013385-A   EMPRISE CORP (EMPR-Non-standard)   DUBOSE R A;  US6057051-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   UCHIDA M,  FUKUOKA Y,  SUGAWARA Y,  EDA N;  US6074769-A   BINSMAIER H (BINS-Individual)   JOHNSSEN W G;  US6124052-A   TOYODA JIDOSHOKKI SEISAKUSHO KK (TOYX)   KATOH H,  KUBO H,  FUJII T;  US6152996-A   AIR-MAZE CORP (AIRM-Non-standard)   LINNERSTEN S B,  FLEMMING R J;  US20010049036-A1   ;  US6190432-B1   DONALDSON CO INC (DOND)   GIESEKE S S,  FINNERTY C J;  US6284397-B1   BALLARD POWER SYSTEMS INC (BLRD)   BARTON R H;  US6296957-B1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   GRAAGE K;  US6309769-B1   PLUG POWER INC (PLUG-Non-standard)   HAUG A T;  US6316134-B1   BALLARD GENERATION SYSTEMS INC (BALL-Non-standard)   COWNDEN R,  EICHE M,  LOUIE C R,  WATKINS D S;  US6420059-B1   CALIFORNIA INST OF TECHNOLOGY (CALY)   SURAMPUDI S,  FRANK H A,  NARAYANAN S R,  CHUN W,  JEFFRIES-NAKAMURA B,  KINDLER A,  HALPERT G;  US6432177-B1   DONALDSON CO INC (DOND)   DALLAS A J,  GOGINS M A,  GRAHAM K M,  ADAMEK D E,  SKUSTER R;  US6436562-B1   EMPRISE TECHNOLOGY ASSOC CORP (EMPR-Non-standard)   DUBOSE R A;  WO2001048850-A1   ;  US2005076623-A1 -- US3812370-A   ENVIRONMENT/ONE CORP (ENVI-Non-standard);  US3847674-A   DU PONT DE NEMOURS & CO E I (DUPO);  US3861894-A   BIO-DYNAMICS INC (BIOD-Non-standard);  US3925043-A   ENVIRONMENT/ONE (ENVI-Non-standard)   MATRONE J L,  LYONS W E;  US4080791-A   EXXON RES & ENG CO (ESSO)   NADLER M,  CAHN R P;  US4129426-A   FLEX AKE WENNBERG (FLEX-Non-standard);  WENNBERG F A AB (WENN-Non-standard);  FLEX AKE WENNBERG A (FLEX-Non-standard);  US4595642-A   MITSUBISHI HEAVY IND CO LTD (MITO)   NAKANISHI K,  TANABE S,  IZUMI J;  US4737173-A   AMWAY CORP (AMWA-Non-standard)   KUDIRKA P J,  HAMILTON R W,  GROCHOSKI G T;  US4909815-A   INT AIR FILTER INC (ITAI-Non-standard)   MEYER R R;  US5013617-A   INT FUEL CELLS CORP (ITFU)   SCHEFFLER G W;  US5139546-A   NOVOBILSKI C G (NOVO-Individual)   NOVOBILSKI C G;  US5156925-A   ALCAN INT LTD (ALCN)   LAPP S P;  US5189092-A   KOSLOW TECHN CORP (KOSL-Non-standard)   KOSLOW E E;  US5221586-A   ISHIKAWAJIMA HARIMA JUKOGYO KK (ISHI);  TOKYO GAS CO LTD (TOLG);  OSAKA GAS CO LTD (OSAG);  TOHO GAS KK (TOHG)   MORIMOTO H,  HATO,  HATORI S,  KOBAYASHI K,  UEMATSU H,  HIKITA T,  SHINOZAKI K,  NAKAGAWA S;  US5331037-A   KOSLOW TECHN CORP (KOSL-Non-standard)   KOSLOW E E;  US5372617-A   CHARLES STARK DRAPER LAB INC (DRAS)   KERREBROCK P A,  WAYNE A S;  US5641031-A   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  US5646852-A   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  US5662184-A   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  US5672399-A   DONALDSON CO INC (DOND)   DUDREY D J,  KAHLBAUGH B;  US5792227-A   DONALDSON CO INC (DOND)   KAHLBAUGH B E,  HERMAN J T,  REINHART S B,  DUDREY D J;  US5792247-A   DONALDSON CO INC (DOND)   GILLINGHAM G R,  RISCH D T,  TOKAR J C,  WAGNER W M,  MATTHYS B A,  STEINBRUECK E A;  US5794732-A   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  US5837393-A   HONDA GIKEN KOGYO KK (HOND)   OKAMOTO T;  US5853441-A   GROEN D D (GROE-Individual);  WITTE K W (WITT-Individual)   GROEN D D,  WITTE K W;  US5944878-A   LINDHE KONSULT & FOERVALTNINGS AB CURT (LIND-Non-standard)   LINDHE C;  US5981096-A   DAIMLER-BENZ AG (DAIM)   LAMM A,  URBAN P,  HORNBURG G;  US6007930-A   FORD GLOBAL TECHNOLOGIES INC (FORD)   ADAMS J A,  SULEK M S,  SALOKA G S;  US6013385-A   EMPRISE CORP (EMPR-Non-standard)   DUBOSE R A;  US6033301-A   FUJI ELECTRIC CO LTD (FJIE)   SUWA N;  US6057051-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   UCHIDA M,  FUKUOKA Y,  SUGAWARA Y,  EDA N;  US6074769-A   BINSMAIER H (BINS-Individual)   JOHNSSEN W G;  US6124052-A   TOYODA JIDOSHOKKI SEISAKUSHO KK (TOYX)   KATOH H,  KUBO H,  FUJII T;  US6152996-A   AIR-MAZE CORP (AIRM-Non-standard)   LINNERSTEN S B,  FLEMMING R J;  US20010049036-A1   ;  US6190432-B1   DONALDSON CO INC (DOND)   GIESEKE S S,  FINNERTY C J;  US6284397-B1   BALLARD POWER SYSTEMS INC (BLRD)   BARTON R H;  US6296957-B1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   GRAAGE K;  US6309769-B1   PLUG POWER INC (PLUG-Non-standard)   HAUG A T;  US6316134-B1   BALLARD GENERATION SYSTEMS INC (BALL-Non-standard)   COWNDEN R,  EICHE M,  LOUIE C R,  WATKINS D S;  US6321637-B1   HONEYWELL INT INC (HONE)   SHANKS A E,  MONNENS P J,  BAHN R R;  US6420059-B1   CALIFORNIA INST OF TECHNOLOGY (CALY)   SURAMPUDI S,  FRANK H A,  NARAYANAN S R,  CHUN W,  JEFFRIES-NAKAMURA B,  KINDLER A,  HALPERT G;  US6432177-B1   DONALDSON CO INC (DOND)   DALLAS A J,  GOGINS M A,  GRAHAM K M,  ADAMEK D E,  SKUSTER R;  US6436562-B1   EMPRISE TECHNOLOGY ASSOC CORP (EMPR-Non-standard)   DUBOSE R A;  US6638339-B2   DONALDSON CO INC (DOND)   DALLAS A J,  GOGINS M A,  GRAHAM K M,  ADAMEK D E,  SKUSTER R;  US6780534-B2   DONALDSON CO INC (DOND)   STENERSEN E,  NYMAN W M,  CANEPA R T;  US6783881-B2   DONALDSON CO INC (DOND)   STENERSEN E,  NYMAN W M,  CANEPA R T;  US6797027-B2   DONALDSON CO INC (DOND)   STENERSEN E,  NYMAN W M,  CANEPA R T;  JP3774195-B2 -- JP07094200-A   ;  JP09063620-A   ;  JP10189010-A   ISHIKAWAJIMA HARIMA HEAVY IND (ISHI)   TAKEI N,  TAKABE S;  JP10321246-A   HONDA MOTOR CO LTD (HOND)   OKAMOTO T,  TANAKA M,  YAMAMOTO A,  FUJII Y;  JP60054177-A   ;  JP2002070762-A   TOYOTA JIDOSHA KK (TOYT)   MOROI T,  UETSUJI K,  FUJII T,  KAGAMI M,  NASUDA T;  JP11501961-W   GORE & ASSOC INC W L (GORE)   BACINO J;  JP11515036-W   GORE & ASSOC INC W L (GORE)   BRANCA P A,  BURGER W,  HUBIS D E,  RUDOLF C,  TILLMANNS R;  JP2004508169-W   DONALDSON CO INC (DOND)   GILLINGHAM G R,  GOGINS M A,  WEIK T M;  US7138008-B2 -- EP677417-A1   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  EP837238-A2   ;  EP1158590-A2   XCELLSIS GMBH (XCEL-Non-standard)   SOHMER P;  EP1162354-A2   FILTERWERK MANN & HUMMEL GMBH (FILW)   FUESSER R;  EP1195830-A2   NISSAN MOTOR CO LTD (NSMO)   ARAMAKI K;  GB2250130-A   VICKERS SHIPBUILDING & ENG (VICS);  CJBD LTD (CJBD-Non-standard)   PALMER I,  SEYMOUR C M,  DAMS R A J;  JP09026177-A   ;  US3812370-A   ENVIRONMENT/ONE CORP (ENVI-Non-standard);  US3847672-A   UNITED AIRCRAFT CORP (UNAC);  US3861894-A   BIO-DYNAMICS INC (BIOD-Non-standard);  US3925043-A   ENVIRONMENT/ONE (ENVI-Non-standard)   MATRONE J L,  LYONS W E;  US4080791-A   EXXON RES & ENG CO (ESSO)   NADLER M,  CAHN R P;  US4129426-A   FLEX AKE WENNBERG (FLEX-Non-standard);  WENNBERG F A AB (WENN-Non-standard);  FLEX AKE WENNBERG A (FLEX-Non-standard);  US4595642-A   MITSUBISHI HEAVY IND CO LTD (MITO)   NAKANISHI K,  TANABE S,  IZUMI J;  US4737173-A   AMWAY CORP (AMWA-Non-standard)   KUDIRKA P J,  HAMILTON R W,  GROCHOSKI G T;  US4909815-A   INT AIR FILTER INC (ITAI-Non-standard)   MEYER R R;  US5013617-A   INT FUEL CELLS CORP (ITFU)   SCHEFFLER G W;  US5139546-A   NOVOBILSKI C G (NOVO-Individual)   NOVOBILSKI C G;  US5156925-A   ALCAN INT LTD (ALCN)   LAPP S P;  US5189092-A   KOSLOW TECHN CORP (KOSL-Non-standard)   KOSLOW E E;  US5221586-A   ISHIKAWAJIMA HARIMA JUKOGYO KK (ISHI);  TOKYO GAS CO LTD (TOLG);  OSAKA GAS CO LTD (OSAG);  TOHO GAS KK (TOHG)   MORIMOTO H,  HATO,  HATORI S,  KOBAYASHI K,  UEMATSU H,  HIKITA T,  SHINOZAKI K,  NAKAGAWA S;  US5331037-A   KOSLOW TECHN CORP (KOSL-Non-standard)   KOSLOW E E;  US5372617-A   CHARLES STARK DRAPER LAB INC (DRAS)   KERREBROCK P A,  WAYNE A S;  US5641031-A   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  US5646852-A   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  US5662184-A   DAIMLER-BENZ AG (DAIM)   RIEMER B,  KLAIBER T;  US5672399-A   DONALDSON CO INC (DOND)   DUDREY D J,  KAHLBAUGH B;  US5792227-A   DONALDSON CO INC (DOND)   KAHLBAUGH B E,  HERMAN J T,  REINHART S B,  DUDREY D J;  US5792247-A   DONALDSON CO INC (DOND)   GILLINGHAM G R,  RISCH D T,  TOKAR J C,  WAGNER W M,  MATTHYS B A,  STEINBRUECK E A;  US5794732-A   DAIMLER-BENZ AG (DAIM)   LORENZ H,  NOREIKAT K,  KLAIBER T,  FLECK W,  SONNTAG J,  HORNBURG G,  GAULHOFER A;  US5837393-A   HONDA GIKEN KOGYO KK (HOND)   OKAMOTO T;  US5853441-A   GROEN D D (GROE-Individual);  WITTE K W (WITT-Individual)   GROEN D D,  WITTE K W;  US5944878-A   LINDHE KONSULT & FOERVALTNINGS AB CURT (LIND-Non-standard)   LINDHE C;  US5981096-A   DAIMLER-BENZ AG (DAIM)   LAMM A,  URBAN P,  HORNBURG G;  US6007930-A   FORD GLOBAL TECHNOLOGIES INC (FORD)   ADAMS J A,  SULEK M S,  SALOKA G S;  US6013385-A   EMPRISE CORP (EMPR-Non-standard)   DUBOSE R A;  US6033301-A   FUJI ELECTRIC CO LTD (FJIE)   SUWA N;  US6057051-A   MATSUSHITA ELECTRIC IND CO LTD (MATU)   UCHIDA M,  FUKUOKA Y,  SUGAWARA Y,  EDA N;  US6074769-A   BINSMAIER H (BINS-Individual)   JOHNSSEN W G;  US6124052-A   TOYODA JIDOSHOKKI SEISAKUSHO KK (TOYX)   KATOH H,  KUBO H,  FUJII T;  US6152996-A   AIR-MAZE CORP (AIRM-Non-standard)   LINNERSTEN S B,  FLEMMING R J;  US20010049036-A1   ;  US6190432-B1   DONALDSON CO INC (DOND)   GIESEKE S S,  FINNERTY C J;  US6284397-B1   BALLARD POWER SYSTEMS INC (BLRD)   BARTON R H;  US6296957-B1   DBB FUEL CELL ENGINES GMBH (DBBF-Non-standard)   GRAAGE K;  US6309769-B1   PLUG POWER INC (PLUG-Non-standard)   HAUG A T;  US6316134-B1   BALLARD GENERATION SYSTEMS INC (BALL-Non-standard)   COWNDEN R,  EICHE M,  LOUIE C R,  WATKINS D S;  US6321637-B1   HONEYWELL INT INC (HONE)   SHANKS A E,  MONNENS P J,  BAHN R R;  US6420059-B1   CALIFORNIA INST OF TECHNOLOGY (CALY)   SURAMPUDI S,  FRANK H A,  NARAYANAN S R,  CHUN W,  JEFFRIES-NAKAMURA B,  KINDLER A,  HALPERT G;  US6432177-B1   DONALDSON CO INC (DOND)   DALLAS A J,  GOGINS M A,  GRAHAM K M,  ADAMEK D E,  SKUSTER R;  US6436562-B1   EMPRISE TECHNOLOGY ASSOC CORP (EMPR-Non-standard)   DUBOSE R A;  US6638339-B2   DONALDSON CO INC (DOND)   DALLAS A J,  GOGINS M A,  GRAHAM K M,  ADAMEK D E,  SKUSTER R;  US6780534-B2   DONALDSON CO INC (DOND)   STENERSEN E,  NYMAN W M,  CANEPA R T;  US6783881-B2   DONALDSON CO INC (DOND)   STENERSEN E,  NYMAN W M,  CANEPA R T;  US6797027-B2   DONALDSON CO INC (DOND)   STENERSEN E,  NYMAN W M,  CANEPA R T;  WO2001048850-A1