WO2006031365-A2 -- US20050000802-A1   ;  US7168464-B2 -- US3837377-A   ;  US4153083-A   CARBA AG (CAR-Non-standard);  IMLER J (IMLE-Individual);  US4240381-A   PURIFICATION SCIENCES INC (PURI-Non-standard)   LOWTHER F E;  US4260000-A   TEXACO INC (TEXC)   MCGAHEY D C,  VEST E W;  US4501253-A   CONSOL NATURAL GAS (CSNA-Non-standard)   GERSTMANN J,  HAUCK W M,  RAYMOND R J,  SWENSON P F;  US4515516-A   CHAMPION PERRINE & (CHAM-Non-standard)   PERRINE P M,  PERRINE C A;  US4522159-A   MICHIGAN CONSOL GAS CO (MICH-Non-standard)   ENGEL L J,  TURKO J W;  US4527600-A   ROCKWELL INT CORP (ROCW)   HRIVANK E E,  FISHER H W;  US4531558-A   MICHIGAN CONSOL GAS CO (MICH-Non-standard)   ENGEL L J,  TURKO J W;  US4646940-A   N INDIANA PUBLIC SE (NIND-Non-standard)   KRAMER R A,  RUSK T P,  SALMONS D W;  US4653986-A   TIDEWATER COMPRESSION SERVICE (TIDE-Non-standard)   ASHTON R;  US4749384-A   UNION CARBIDE CORP (UNIC)   NOWOBILSKI J J,  NOTARO F,  ACHARYA A;  US4966206-A   GEBR SULZER AG (SULZ)   BAUMANN H,  MUTTER H,  SCHREIBER K,  THURIG P;  US4984457-A   NAT AERO & SPACE ADMIN (USAS)   MORRIS B G;  US5029622-A   GEBR SULZER AG (SULZ)   MUTTER H;  US5156198-A   HALL G L (HALL-Individual)   HALL G L;  US5169295-A   TREN.FUELS INC (TREN-Non-standard)   STOGNER J,  WESTMORELAND S,  KICKER D J;  US5238030-A   FUEL SYSTEMS INC (FUEL-Non-standard)   MILLER C E,  WAERS J F,  MAGIN J A,  CUSTER R L,  LOPEZ J T;  US5259424-A   FUEL SYSTEMS INC (FUEL-Non-standard)   MILLER C E,  WAERS J F,  MAGIN J A,  CUSTER R L,  LOPEZ J T;  US5351726-A   WAGNER & BROWN LTD (WAGN-Non-standard)   DIGGINS D A;  US5370159-A   PRICE COMPRESSOR CO INC (PRIC-Non-standard)   PRICE B F;  US5409046-A   EVERSOLE G H (EVER-Individual);  SWENSON P F (SWEN-Individual)   SWENSON P F,  EVERSOLE G H;  US5454408-A   THERMO POWER CORP (THER-Non-standard)   MASTRONARDI R,  DIBELLA F A,  KOPLOW M D;  US5538051-A   PINNACLE CNG SYSTEMS LLC (PINN-Non-standard)   BROWN J E,  DIGGINS D A;  US5628349-A   PINNACLE CNG SYSTEMS LLC (PINN-Non-standard)   DIGGINS D A,  BROWN J E;  US5694985-A   PINNACLE CNG SYSTEMS LLC (PINN-Non-standard)   DIGGINS D A