;  US7208845-B2 -- US3970877-A   RUSSELL M K (RUSS-Individual)   RUSSELL M K,  RUSSELL A W;  US4047832-A   POLYTECHNIC INST (POLY-Non-standard);  SFORZA P M (SFOR-Individual)   SFORZA P M;  US4464939-A   ROSEMOUNT INC (ROEC)   CORPRON G P;  US4627294-A   LEW H S (LEWH-Individual)   LEW H S;  US20060064972-A1   ;  US6351999-B1   ENDRESS & HAUSER FLOWTEC AG (ENDR)   MAUL J,  OHLE F;  US6424079-B1   OCEAN POWER TECHNOLOGIES INC (OCEA-Non-standard)   CARROLL C B;  EP44822-A   ;  US2960109-A   ;  US3342267-A   ;  US3398302-A   ;  US3766399-A   ;  US3968387-A   ;  US4387318-A   PIEZO ELEC PROD INC (PIEZ-Non-standard)   KOLM E A,  KOLM H H;  US4467236-A   PIEZO ELEC PROD INC (PIEZ-Non-standard)   KOLM H H,  KOLM E A;  US4769569-A   ;  US4808874-A   FORD AEROSPACE CORP (FORD)   STAHLHUTH P H;  US5295397-A   UNIV TEXAS A & M SYSTEM (TEXA)   HOLSTE J C,  HALL K R,  MORRISON G L;  US5547029-A   PETROLEUM ENG SERVICES INC (PETR-Non-standard)   RUBBO R P,  BOULDIN B W,  OWENS S C;  US5554922-A   HANSA METALLWERKE AG (HNSM)   KUNKEL H;  US5626200-A   HALLIBURTON CO (HALL)   GILBERT G N,  TOMEK M L;  US5703474-A   OCEAN POWER TECHNOLOGIES INC (OCEA-Non-standard)   SMALSER P;  US5801475-A   KIMURA M (KIMU-Individual);  RICOH SEIKI CO LTD (RICO)   KIMURA M;  US5839508-A   BAKER HUGHES INC (BAKO)   TUBEL P,  HOLCOMBE M W,  BAUGH J L,  MULLINS A A,  ROSS R;  US5907211-A   MASSACHUSETTS INST TECHNOLOGY (MASI)   HALL S R,  PRECHTL E F;  US5979558-A   ;  US5995020-A   PES INC (PESP-Non-standard)   OWENS S,  ELLIOTT G;  US6011346-A   HALLIBURTON ENERGY SERVICES INC (HALL)   BUCHANAN R J,  BUTTERFIELD C A;  US6020653-A   AQUA MAGNETICS INC (AQUA-Non-standard)   WOODBRIDGE D D,  WOODBRIDGE T C;  US20020096887-A1   ;  US20050051323-A1   ;  US20050230973-A1   ;  US6179052-B1   PES INC (PESP-Non-standard);  PETROLEUM ENG SERVICES LTD (PETR-Non-standard)   BOULDIN B,  PURKIS D;  US6470970-B1   HALLIBURTON ENERGY SERVICES INC (HALL)   PURKIS D G,  BOULDIN B W,  RUBBO R P;  US6567013-B1   HALLIBURTON ENERGY SERVICES INC (HALL)   PURKIS D G,  REID M A;  US6659184-B1   PES INC (PESP-Non-standard);  PETROLEUM ENG SERVICES LTD (PETR-Non-standard)   RUBBO R P,  TIPS T R,  BOULDIN B;  US6672409-B1   CHARLES MACHINE WORKS (CHAR-Non-standard);  DOCK M L (DOCK-Individual);  STEPHENSON B G (STEP-Individual)   DOCK M L,  STEPHENSON B G;  US6504258-B2   HALLIBURTON ENERGY SERVICES INC (HALL)   SCHULTZ R L,  RINGGENBERG P D,  ROBISON C E,  MICHAEL R K,  BAYH R I;  US6554074-B2   LONGBOTTOM J R (LONG-Individual)   LONGBOTTOM J R;  US6575237-B2   PES INC (PESP-Non-standard);  PETROLEUM ENG SERVICES LTD (PETR-Non-standard)   BOULDIN B,  PURKIS D;  US6585051-B2   HALLIBURTON ENERGY SERVICES INC (HALL)   PURKIS D G,  REID M A,  WILLIAMSON J R;  US6607030-B2   ALLIED-SIGNAL INC (ALLC)   BAUER W,  FRASER E C,  MORE H;  WO2002010553-A1   ;  WO2002057589-A2