;  US6767389-B2 -- EP1065741-A2   MITSUBISHI HEAVY IND CO LTD (MITO)   IIJIMA M,  KOBAYASHI K;  JP01145302-A   ;  JP01145303-A   ;  JP01262903-A   ;  JP06134244-A   ;  JP45002642   ;  JP45014404   ;  US2824620-A   ;  US3208198-A   ;  US3336730-A   ;  US3344586-A   ;  US3350176-A   ;  US3350845-A   ;  US3356538-A   ;  US3368329-A   ;  US3428476-A   ;  US3439474-A   ;  US3447288-A   ;  US3450500-A   ;  US3469372-A   ;  US3469944-A   ;  US3486301-A   ;  US3520803-A   IONICS INC (IONI);  US3534531-A   ;  US3564819-A   GENERAL ELECTRIC CO (GENE);  US3665680-A   ENGELHARD MINERALS & CHEM CORP (ENGH);  US3713270-A   NAT RES DEV CORP (NATR);  US3761382-A   TRIENCO INC (TRIE-Non-standard);  US3839110-A   WESTERN ELECTRIC CO INC (AMTT);  US3849076-A   V M GRYAZNOV (GRYA-Individual);  US3881891-A   URALSKY POLIT INST KIROV (URA-Non-standard);  US3881897-A   RHONE-POULENC S A (RHON);  US3972695-A   ;  US4003725-A   TRIENCO INC (TRIE-Non-standard)   BUNN J W,  BUCKLEY C O;  US4056373-A   RESOURCE SYSTEMS IN (RESO-Non-standard)   RUBIN L R; 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