US6155160-A -- US3662171-A   ;  US3778798-A   ;  US3815113-A   CANADIAN GENERAL ELECTRIC CO (GENE);  US3861809-A   PERKIN-ELMER CORP (PEKE)   HALL J F;  US3955186-A   GREENPAR HEAT TREAT (GREE-Non-standard)   WASHBURN C A,  SAUSELE G J H;  US4164539-A   ;  US4224280-A   FUJI ELECTRIC MFG CO LTD (FJIE)   TAKAHAMA T,  KAZAMA T;  US4323777-A   ;  US4437005-A   ;  US4489239-A   NAT AERO & SPACE ADMIN (USAS)   GRANT W B,  HINKLEY E D;  US4500207-A   FERRANTI PLC (FRRN)   MAIDEN A J;  US4560875-A   EDINBURGH INST LTD (EDIN-Non-standard);  EIGD LTD (EIGD-Non-standard);  INT GAS DETECTORS LTD (ITGA-Non-standard)   CROWDER J G;  US4567366-A   SHOWA DENKO KK (SHOW)   SHINOHARA A;  US4580439-A   RICOH SEIKI CO LTD (RICO)   MANAKA J;  US4614669-A   WESTINGHOUSE ELECTRIC CORP (WESE);  US4647777-A   AMETEK INC (AMET)   MEYER E;  US4694174-A   ;  US4709150-A   BUROUGH I G (BURO-Individual)   BUROUGH I G,  PELLISSIER R O,  JOHNSON K W;  US4853543-A   OZDEMIR P (OZDE-Individual)   OZDEMIR P;  US4862147-A   PURITAN-BENNETT AER (PURI-Non-standard)   THOMAS B E;  US4869233-A   GAS RES INST (GASR-Non-standard)   STULEN F B,  PAPE D B,  WILLIAMS W J;  US4871916-A   ;  US4899053-A   CRITICARE SYSTEMS INC (CRIT-Non-standard)   LAI N C J,  ZUPERKU E J;  US4916437-A   GAZZAZ H H (GAZZ-Individual)   GAZZAZ H H;  US4958076-A   GAS RES INST (GASR-Non-standard)   BONNIE U,  MATTHYS R J;  US5003812-A   ;  US5012671-A   RICOH KK (RICO)   YAGAWARA S,  OHTA W;  US5026992-A   GAZTECH CORP (GAZT-Non-standard)   WONG J Y;  US5070244-A   ;  US5096116-A   MATSUSHITA ELEC IND CO LTD (MATU);  AKAMATU Y (AKAM-Individual)   YOKOHATA M,  HASHIMOTO F,  AKAMATU Y;  US5218347-A   LINDALE IND INC (LIND-Non-standard)   DEPPE D F;  US5250170-A   ;  US5372785-A   INT BUSINESS MACHINES CORP (IBMC)   JOHNSON C L,  SILVERMAN S L;  US5379026-A   ;  US5398597-A   HENNY PENNY CORP (HENN-Non-standard)   JONES R L,  STIRLING R W,  LANDWEHR T A;  US5444249-A   TELAIRE SYSTEMS INC (TELA-Non-standard)   WONG J Y;  US5464983-A   IND SCI CORP (INSC-Non-standard)   WANG A Q;  US5475222-A   ;  US5608219-A   ;  US5637872-A   TULIP J (TULI-Individual)   TULIP J;  US5650024-A   NIPPON STEEL CORP (YAWA)   FUJITA T,  HASEGAWA Y,  OHGAMI M,  MIZUHASHI N,  NAOI H;  US5650624-A   ENGELHARD SENSOR TECHNOLOGIES INC (ENGH)   WONG J Y;  US5709222-A   DAVALLOU H H (DAVA-Individual)   DAVALLOU H H;  US5712481-A   ASHLAND INC (ASHL)   WILT B K,  MAGGARD S M,  BLEDSOE R R,  WELCH W T,  SUMNER M B;  US5721430-A   ENGELHARD SENSOR TECHNOLOGIES INC (ENGH)   WONG J Y;  US5753797-A   CERBERUS AG (CERG)   FORSTER M,  PLEISCH R,  BARAKET M;  US5780715-A   MINE SAFETY APPLIANCES CO (MINJ)   IMBLUM G G;  US5785512-A   ;  US5793295-A   ;  US5797358-A   SMITH WATER PROD CO A O (SMIC)   BRANDT J H,  MEYER R T,  PLANK B N;  US5807098-A   DESA INT INC (DESA-Non-standard)   DENG D;  US5813394-A   CLIFFORD T W (CLIF-Individual)   CLIFFORD T W;  US5822058-A   SPECTRAL SCI INC (SPEC-Non-standard)   ADLER-GOLDEN S,  BERNSTEIN L S,  BIEN F,  GERSH M E,  GOLDSTEIN N;  US5828307-A   PHILLIPS PETROLEUM CO (PHIP)   WASHER T J;  US5879631-A   MANNING SYSTEM INC (MANN-Non-standard)   EUDALY B K,  WEWERS F J,  EUDALY K;  US5933245-A   HONEYWELL INC (HONE)   WOOD R A,  REZACHEK T M,  HEGEL R R