US5762885-A -- US4153102-A   AIR PREHEATER CO INC (AIRT);  SVENSKA ROTOR MASKINER AB (SVRO)   STOCKMAN R F;  US4418046-A   DAIKIN KOGYO KK (DAIK)   IZUMO M,  KAMETANI K,  OTA S;  US4602673-A   STEINMUELLER GMBH L & C (STEM)   MICHELFELD S,  MICHALAK S;  US4739826-A   STEINMUELLER GMBH L & C (STEM)   MICHELFELD S,  MICHALAK S;  US4833877-A   BERGWERKSVERBAND GMBH (BERG)   AHLAND E,  VERFUSS F,  BEYER H D,  LEHMANN J;  US4903755-A   STEINMUELLER GMBH L & C (STEM)   MICHELFELD S,  MICHALAK S;  US4960166-A   HIRT COMBUSTION ENG (HIRT-Non-standard)   HIRT J H;  US5051391-A   MITSUBISHI JUKOGYO KK (MITO)   TOMISAWA S,  LIDA J,  TONOMURA J,  KAIHARA Y,  LSHII T,  USHIOGI M,  ONO N,  UOYA K;  US5237939-A   WAHLCO ENVIRONMENTAL SYSTEMS INC (WAHL-Non-standard)   SPOKOYNY F E,  KRIGMONT H V;  US5254512-A   SUMITOMO SEIKA CHEM CO LTD (SEIT)   UEDA K,  TAKATA Y,  SHIBAHARA T,  YOSHIDA Y;  US5318102-A   WAHLCO POWER PROD INC (WAHL-Non-standard)   KRIGMONT H V,  SPOKOYNY F E,  HALL M K;  US5323842-A   WAHLCO ENVIRONMENTAL SYSTEMS INC (WAHL-Non-standard)   KOZACKA W R,  SPOKOYNY F E,  KRIGMONT H V;  US5451558-A   GOAL LINE ENVIRONMENTAL TECHNOLOGIES (GOAL-Non-standard)   CAMPBELL L E,  DANZIGER R,  GUTH E D,  PADRON S;  US5603909-A   BABCOCK & WILCOX CO (BABW)   JOHNSON D W,  VARNER M G,  MYERS R B;  US5607650-A   GOAL LINE ENVIRONMENTAL TECHNOLOGIES (GOAL-Non-standard)   PADRON S,  DANZIGER R N,  DEBBAGE L,  GUTH E D,  KELLEY E,  CAMPBELL L E;  US5622041-A   ENGELHARD CORP (ENGH)   FEELEY J S,  FU J C,  LARKIN M P,  SIMONE D O;  US5665321-A   GOAL LINE ENVIRONMENTAL TECHNOLOGIES (GOAL-Non-standard)   CAMPBELL L E,  DANZIGER R,  GUTH E D,  PADRON S;  WO9836820-A1 -- US5603909-A   BABCOCK & WILCOX CO (BABW)   JOHNSON D W,  VARNER M G,  MYERS R B;  US5607650-A   GOAL LINE ENVIRONMENTAL TECHNOLOGIES (GOAL-Non-standard)   PADRON S,  DANZIGER R N,  DEBBAGE L,  GUTH E D,  KELLEY E,  CAMPBELL L E;  US5622041-A   ENGELHARD CORP (ENGH)   FEELEY J S,  FU J C,  LARKIN M P,  SIMONE D O;  US5665321-A   GOAL LINE ENVIRONMENTAL TECHNOLOGIES (GOAL-Non-standard)   CAMPBELL L E,  DANZIGER R,  GUTH E D,  PADRON S;  EP1028795-A1 -- JP05285343-A   ;  JP62014924-A   BABCOCK-HITACHI KK (HITG)   SAKATA S,  ISHIKAWA T;  EP1028795-B1 -- JP05285343-A   ;  JP62014924-A   BABCOCK-HITACHI KK (HITG)   SAKATA S,  ISHIKAWA T;  US5603909-A   BABCOCK & WILCOX CO (BABW)   JOHNSON D W,  VARNER M G,  MYERS R B;  US5607650-A   GOAL LINE ENVIRONMENTAL TECHNOLOGIES (GOAL-Non-standard)   PADRON S,  DANZIGER R N,  DEBBAGE L,  GUTH E D,  KELLEY E,  CAMPBELL L E;  US5622041-A   ENGELHARD CORP (ENGH)   FEELEY J S,  FU J C,  LARKIN M P,  SIMONE D O;  US5665321-A   GOAL LINE ENVIRONMENTAL TECHNOLOGIES (GOAL-Non-standard)   CAMPBELL L E,  DANZIGER R,  GUTH E D,  PADRON S