Inventor · disambiguated record
Kenji Tojo
Also filed as: ARAI NOBUKATSU · TOJO KENJI
59 granted patents·7 pending applications·1,662 citations·filing 1978–2015
99Inventor score
Files withHITACHI LTD43HITACHI APPLIANCES INC9TEIJIN PHARMA LTD4HITACHI AIR CONDITIONING SYS2SHIIBAYASHI MASAO2
Top patents by PatentIndex Score
66 records- 0199US4496296ADevice for pressing orbiting scroll member in scroll type fluid machineHITACHI LTD·Filed 1983·Granted Jan 29, 1985·150 cites·26 claims
- 0298US4475360ARefrigeration system incorporating scroll type compressorHITACHI LTD·Filed 1983·Granted Oct 9, 1984·132 cites·13 claims
- 0398US4216661AScroll compressor with means for end plate bias and cooled gas return to sealed compressor spacesHITACHI LTD·Filed 1978·Granted Aug 12, 1980·107 cites·7 claims
- 0497US5660539AScroll compressorHITACHI LTD·Filed 1995·Granted Aug 26, 1997·115 cites·17 claims
- 0596US4365941AScroll compressor provided with means for pressing an orbiting scroll member against a stationary scroll member and self-cooling meansHITACHI LTD·Filed 1980·Granted Dec 28, 1982·90 cites·11 claims
- 0694US5775893AScroll compressor having an orbiting scroll with volute wraps on both sides of a plateHITACHI LTD·Filed 1996·Granted Jul 7, 1998·94 cites·7 claims
- 0793US4950135APiezoelectric powered scroll compressorHITACHI LTD·Filed 1988·Granted Aug 21, 1990·66 cites·21 claims
- 0891US5137437AScroll compressor with improved bearingHITACHI LTD·Filed 1991·Granted Aug 11, 1992·63 cites·17 claims
- 0990US7442017B2Displacement type compressor having a self-start synchronous motor and start load reducing meansHITACHI APPLIANCES INC·Filed 2005·Granted Oct 28, 2008·10 cites·3 claims
- 1090US6152714ADisplacement type fluid machine having rotation suppression of an orbiting displacerHITACHI LTD·Filed 1997·Granted Nov 28, 2000·57 cites·9 claims
- 1189US5425626AScroll type fluid machine with an involute spiral based on a circle having a varying radiusHITACHI LTD·Filed 1993·Granted Jun 20, 1995·56 cites·15 claims
- 1288US7437882B2Apparatus for driving a compressor and a refrigerating air conditionerHITACHI AIR CONDITIONING SYS·Filed 2005·Granted Oct 21, 2008·10 cites·9 claims
- 1388US5063829AVariable displacement swash plate type compressorHITACHI LTD·Filed 1990·Granted Nov 12, 1991·65 cites·21 claims
- 1486US4462772AOil feeding device for scroll fluid apparatusHITACHI LTD·Filed 1981·Granted Jul 31, 1984·32 cites·9 claims
- 1585US6352418B1Displacement type fluid machineHITACHI LTD·Filed 2000·Granted Mar 5, 2002·27 cites·20 claims
- 1685US5511959AScroll type fluid machine with parts of sintered ceramicsHITACHI LTD·Filed 1994·Granted Apr 30, 1996·49 cites·13 claims
- 1781US5295808ASynchronous rotating type scroll fluid machineHITACHI LTD·Filed 1992·Granted Mar 22, 1994·37 cites·8 claims
- 1880US6708520B2Scroll compressor and refrigerating system using ammonia group refrigerantHITACHI LTD TRUSTEE FOR THE BE·Filed 2002·Granted Mar 23, 2004·17 cites·12 claims
- 1979US5105728ABalanced variable-displacement compressorHITACHI LTD·Filed 1990·Granted Apr 21, 1992·40 cites·10 claims
- 2079US4801248AVariable capacity swash plate compressorHITACHI LTD·Filed 1987·Granted Jan 31, 1989·35 cites·7 claims
- 2177US4867649ARefrigerating systemHITACHI LTD·Filed 1986·Granted Sep 19, 1989·33 cites·1 claims
- 2276US7758326B2Scroll fluid machineHITACHI APPLIANCES INC·Filed 2007·Granted Jul 20, 2010·6 cites·7 claims
- 2376US7082786B2Scroll compressor and refrigerating system using ammonia group refrigerantHITACHI LTD·Filed 2003·Granted Aug 1, 2006·14 cites·9 claims
- 2476US6923016B2Refrigeration cycle apparatusFiled 2004·Granted Aug 2, 2005·23 cites·7 claims
- 2575US10004915B2Transcranial magnetic stimulation systemTEIJIN PHARMA LTD·Filed 2012·Granted Jun 26, 2018·8 cites·16 claims
- 2675US7824160B2Scroll compressor and refrigerating apparatusHITACHI APPLIANCES INC·Filed 2006·Granted Nov 2, 2010·5 cites·16 claims
- 2773US4350479AScrool-type fluid machine with liquid-filled force-balanced pocketsHITACHI LTD·Filed 1980·Granted Sep 21, 1982·25 cites·42 claims
- 2872US6006542ARefrigerant compressor and refrigerating apparatusHITACHI LTD·Filed 1998·Granted Dec 28, 1999·19 cites·19 claims
- 2971US6286334B1Refrigerant compressor and refrigerating apparatusHITACHI LTD·Filed 2000·Granted Sep 11, 2001·8 cites·20 claims
- 3070US4384831AScroll-type fluid apparatus provided with means for counteracting a moment exerted on orbiting scroll memberHITACHI LTD·Filed 1980·Granted May 24, 1983·23 cites·14 claims
- 3169US5231914AVariable displacement compressorHITACHI LTD·Filed 1991·Granted Aug 3, 1993·27 cites·13 claims
- 3269US4396364AScroll fluid apparatus with crankshaft bearing located in orbiting pin force planeHITACHI LTD·Filed 1981·Granted Aug 2, 1983·21 cites·9 claims
- 3368US7438539B2Hermetic type scroll compressor and refrigerating and air-conditioning apparatusHITACHI AIR CONDITIONING SYS·Filed 2006·Granted Oct 21, 2008·5 cites·9 claims
- 3468US6966194B2Refrigerating machineHITACHI LTD·Filed 2004·Granted Nov 22, 2005·15 cites·7 claims
- 3567US6832488B2Refrigerating machineHITACHI LTD·Filed 2003·Granted Dec 21, 2004·14 cites·11 claims
- 3663US7628593B2Horizontal type scroll compressor including a first space and a second spaceHITACHI APPLIANCES INC·Filed 2007·Granted Dec 8, 2009·3 cites·6 claims
- 3763US4861245AScroll compressor with sealed pressure space biasing the orbiting scroll memberHITACHI LTD·Filed 1987·Granted Aug 29, 1989·20 cites·11 claims
- 3862US6925824B2Apparatus for driving a compressor and a refrigerating air conditionerFiled 2003·Granted Aug 9, 2005·10 cites·4 claims
- 3962US4441870AScroll memberHITACHI LTD·Filed 1981·Granted Apr 10, 1984·16 cites·6 claims
- 4062US4417863AScroll member assembly of scroll-type fluid machineHITACHI LTD·Filed 1981·Granted Nov 29, 1983·17 cites·14 claims
- 4158US2003033165A1Environmental service system and environmental service businessFiled 2002·Application pending·0 cites
- 4257US4555224AOil feeding device for scroll fluid apparatusHITACHI LTD·Filed 1984·Granted Nov 26, 1985·11 cites·6 claims
- 4356US4473343ABearing device for scroll-type compressorHITACHI LTD·Filed 1982·Granted Sep 25, 1984·14 cites·4 claims
- 4455US6055827ARefrigerant compressor and refrigerating apparatusHITACHI LTD·Filed 1999·Granted May 2, 2000·9 cites·2 claims
- 4554US8435014B2Hermetically sealed scroll compressorSHIIBAYASHI MASAO·Filed 2012·Granted May 7, 2013·0 cites·6 claims
- 4654US4579512AScroll-type fluid machine with radial clearance between wrapsHITACHI LTD·Filed 1984·Granted Apr 1, 1986·13 cites·3 claims
- 4754US2009010776A1Displacement type compressor having a self-start synchronous motor and start load reducing meansHITACHI APPLIANCES INC·Filed 2008·Application pending·0 cites
- 4853US9239053B2Hermetically sealed scroll compressorSHIIBAYASHI MASAO·Filed 2009·Granted Jan 19, 2016·0 cites·17 claims
- 4952US4464100AScroll fluid apparatus handling compressible fluidHITACHI LTD·Filed 1982·Granted Aug 7, 1984·12 cites·6 claims
- 5052US4443166AScroll fluid apparatus with an arcuate recess adjacent the stationary wrapHITACHI LTD·Filed 1981·Granted Apr 17, 1984·12 cites·14 claims
Showing the top 50 of 66 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →