Assignee
HITACHI PLANT ENG & CONSTR CO
JP·38 granted patents·2 pending applications·956 citations·filing 1976–2006
Top patents by PatentIndex Score
40 records- 0192US6732540B2Air conditioning plant and control method thereofHITACHI PLANT ENG & CONSTR CO·Filed 2002·Granted May 11, 2004·177 cites·12 claims
- 0290US5018202AElectronic noise attenuation systemHITACHI PLANT ENG & CONSTR CO·Filed 1989·Granted May 21, 1991·109 cites·4 claims
- 0390US4667481AMethod of and apparatus for emitting light in iceHITACHI PLANT ENG & CONSTR CO·Filed 1985·Granted May 26, 1987·91 cites·3 claims
- 0487US4440552AElectrostatic particle precipitatorHITACHI PLANT ENG & CONSTR CO·Filed 1982·Granted Apr 3, 1984·75 cites·9 claims
- 0586US7144508B2Method and apparatus of removing nitrogenHITACHI PLANT ENG & CONSTR CO·Filed 2005·Granted Dec 5, 2006·10 cites·1 claims
- 0686US4783817AElectronic noise attenuation systemHITACHI PLANT ENG & CONSTR CO·Filed 1987·Granted Nov 8, 1988·76 cites·14 claims
- 0782US4693173AClean roomHITACHI PLANT ENG & CONSTR CO·Filed 1985·Granted Sep 15, 1987·37 cites·15 claims
- 0880US7267764B2Apparatus for removing nitrogenHITACHI PLANT ENG & CONSTR CO·Filed 2006·Granted Sep 11, 2007·6 cites·8 claims
- 0980US6916651B2Heat treated immobilized microorganism support for enviroment remediationHITACHI PLANT ENG & CONSTR CO·Filed 2002·Granted Jul 12, 2005·6 cites·11 claims
- 1076US4791061AImmobilization of microorganisms by entrapmentHITACHI PLANT ENG & CONSTR CO·Filed 1986·Granted Dec 13, 1988·48 cites·11 claims
- 1171US4117255AInsulator bushing for high voltage inputHITACHI PLANT ENG & CONSTR CO·Filed 1977·Granted Sep 26, 1978·24 cites·3 claims
- 1269US6576451B1Oligomers for polymerizing to produce hydrous gels entrapping microorganismsHITACHI PLANT ENG & CONSTR CO·Filed 2000·Granted Jun 10, 2003·4 cites·6 claims
- 1369US5849180AMethod of biologically removing nitrogen and system thereforHITACHI PLANT ENG & CONSTR CO·Filed 1998·Granted Dec 15, 1998·24 cites·3 claims
- 1469US4130268ARotary valve for powdery and granular materialsHITACHI PLANT ENG & CONSTR CO·Filed 1977·Granted Dec 19, 1978·25 cites·1 claims
- 1567US5558763ASewage treatment system with air jetting meansHITACHI PLANT ENG & CONSTR CO·Filed 1994·Granted Sep 24, 1996·27 cites·10 claims
- 1666US5976378AMethod and system for removing nitrogen and immobilized microorganismsHITACHI PLANT ENG & CONSTR CO·Filed 1997·Granted Nov 2, 1999·23 cites·10 claims
- 1764US6572468B1Clean room deviceHITACHI PLANT ENG & CONSTR CO·Filed 1999·Granted Jun 3, 2003·34 cites·8 claims
- 1863US7192765B2Method for producing a nitrification carrier and for removing nitrogenHITACHI PLANT ENG & CONSTR CO·Filed 2003·Granted Mar 20, 2007·4 cites·12 claims
- 1957US6601610B1Changeover valve and gas transportation pipe systemHITACHI PLANT ENG & CONSTR CO·Filed 2002·Granted Aug 5, 2003·8 cites·11 claims
- 2056US6336746B1Structure for supporting rotary shaftHITACHI PLANT ENG & CONSTR CO·Filed 2000·Granted Jan 8, 2002·6 cites·3 claims
- 2156US6033569AMethod of biologically removing nitrogen and system thereforHITACHI PLANT ENG & CONSTR CO·Filed 1998·Granted Mar 7, 2000·15 cites·2 claims
- 2255US7676925B2Lifting construction method and raising/lowering equipment of boiler moduleHITACHI PLANT ENG & CONSTR CO·Filed 2005·Granted Mar 16, 2010·2 cites·4 claims
- 2354US6627080B2Flat membrane diskHITACHI PLANT ENG & CONSTR CO·Filed 2001·Granted Sep 30, 2003·8 cites·6 claims
- 2453US5578200ASewage treatment systemHITACHI PLANT ENG & CONSTR CO·Filed 1995·Granted Nov 26, 1996·19 cites·3 claims
- 2551US5997736AMethod of biologically removing nitrogen and system thereforHITACHI PLANT ENG & CONSTR CO·Filed 1998·Granted Dec 7, 1999·12 cites·8 claims
- 2648US7000419B1High-efficiency gas temperature/humidity controlling device and controlling methodHITACHI PLANT ENG & CONSTR CO·Filed 2000·Granted Feb 21, 2006·4 cites·17 claims
- 2748US6354896B1Method of assembling movable electrode type electric dust collecting apparatusHITACHI PLANT ENG & CONSTR CO·Filed 2000·Granted Mar 12, 2002·4 cites·8 claims
- 2848US6251258B1Method and apparatus for removing toxic substances from waste marine productsHITACHI PLANT ENG & CONSTR CO·Filed 1999·Granted Jun 26, 2001·12 cites·7 claims
- 2948US2005135538A1Method of handling a structure and equipment of handling the sameHITACHI PLANT ENG & CONSTR CO·Filed 2003·Application pending·0 cites
- 3048US2005171834A1Work status prediction apparatus, method of predicting work status, and work status prediction programHITACHI PLANT ENG & CONSTR CO·Filed 2005·Application pending·0 cites
- 3147US7105337B2Method of removing exogenous endocrine-disrupting chemical in waterHITACHI PLANT ENG & CONSTR CO·Filed 2002·Granted Sep 12, 2006·0 cites·5 claims
- 3247US6609415B2Method of evaluating adsorption of contaminant on solid surfaceHITACHI PLANT ENG & CONSTR CO·Filed 2001·Granted Aug 26, 2003·1 cites·4 claims
- 3346US6637982B2Gas transportation method for grainHITACHI PLANT ENG & CONSTR CO·Filed 2002·Granted Oct 28, 2003·4 cites·7 claims
- 3444US6041491ARod attaching/detaching device for a lifting jack and method of coupling suspending rodsHITACHI PLANT ENG & CONSTR CO·Filed 1997·Granted Mar 28, 2000·12 cites·7 claims
- 3544US5876603AMethod of biologically removing nitrogen and system thereforHITACHI PLANT ENG & CONSTR CO·Filed 1996·Granted Mar 2, 1999·9 cites·3 claims
- 3644US5061368ASystem for treating waste water by nitrificationHITACHI PLANT ENG & CONSTR CO·Filed 1990·Granted Oct 29, 1991·18 cites·10 claims
- 3742US6868680B2Air-conditioning control apparatus using heaterHITACHI PLANT ENG & CONSTR CO·Filed 2003·Granted Mar 22, 2005·5 cites·4 claims
- 3842US6637983B2Gas transportation method for grainHITACHI PLANT ENG & CONSTR CO·Filed 2002·Granted Oct 28, 2003·2 cites·12 claims
- 3940US5382423AApparatus for recovering calcium fluoride from fluoroetchantHITACHI PLANT ENG & CONSTR CO·Filed 1993·Granted Jan 17, 1995·4 cites·1 claims
- 4036US4099573ASprinkler headHITACHI PLANT ENG & CONSTR CO·Filed 1976·Granted Jul 11, 1978·11 cites·11 claims
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