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Inventor

Kenji Tojo

Inventor
Ibaraki, JP

Overview

60→
Patents
1980–2019
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 60 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

F04Cprimary
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids33%
F01CRotary-piston or oscillating-piston machines or engines19%
F25BRefrigeration machines, plants or systems10%
F04BPositive-displacement machines for liquids7%
F05BIndexing scheme relating to wind, spring, weight, inertia or like motors, to machines or engines for liquids covered by subclasses f03b, f03d and f03g4%
F05CIndexing scheme relating to materials, material properties or material characteristics for machines, engines or pumps other than non-positive-displacement machines or engines3%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications3%
A61BDiagnosis2%
A61NElectrotherapy2%
C10MLubricating compositions2%
PatentTitleYear
10,413,744Transcranial magnetic stimulation system201910,004,915Transcranial magnetic stimulation system20189,682,249'Transcranial magnetic stimulation system'20179,239,053'Hermetically sealed scroll compressor'20168,435,014'Hermetically sealed scroll compressor'20138,241,021'Displacement type compressor having a self-start synchronous motor and start load reducing means'20127,902,713'Self-starting type permanent magnet synchronous motor and a compressor using the same'20117,824,160'Scroll compressor and refrigerating apparatus'20107,758,326'Scroll fluid machine'20107,628,593'Horizontal type scroll compressor including a first space and a second space'20097,442,017'Displacement type compressor having a self-start synchronous motor and start load reducing means'20087,437,882'Apparatus for driving a compressor and a refrigerating air conditioner'20087,438,539'Hermetic type scroll compressor and refrigerating and air-conditioning apparatus'20087,082,786'Scroll compressor and refrigerating system using ammonia group refrigerant'20066,966,194'Refrigerating machine'20056,925,824'Apparatus for driving a compressor and a refrigerating air conditioner'20056,923,016'Refrigeration cycle apparatus'20056,832,488'Refrigerating machine'20046,708,520'Scroll compressor and refrigerating system using ammonia group refrigerant'20046,406,279'Displacement type fluid machine'20026,352,418'Displacement type fluid machine'20026,332,763'Displacement type fluid machine having an orbiting displacer forming a plurality of spaces'20016,332,764'Displacement type fluid machine having an orbiting displacer forming a plurality of spaces and method for manufacturing same'20016,286,334'Refrigerant compressor and refrigerating apparatus'20016,213,743'Displacement type fluid machine'20016,179,593'Displacement fluid machine'20016,164,941'Displacement type fluid machine having an orbiting displacer forming a plurality of spaces'20006,152,714'Displacement type fluid machine having rotation suppression of an orbiting displacer'20006,055,827'Refrigerant compressor and refrigerating apparatus'20006,006,542'Refrigerant compressor and refrigerating apparatus'19995,775,893'Scroll compressor having an orbiting scroll with volute wraps on both sides of a plate'19985,660,539'Scroll compressor'19975,622,488'Scroll type fluid machine having first and second frame members to increase air tightness'19975,511,959'Scroll type fluid machine with parts of sintered ceramics'19965,425,626'Scroll type fluid machine with an involute spiral based on a circle having a varying radius'19955,295,808'Synchronous rotating type scroll fluid machine'19945,231,914'Variable displacement compressor'19935,137,437'Scroll compressor with improved bearing'19925,105,728'Balanced variable-displacement compressor'19925,063,829'Variable displacement swash plate type compressor'1991RE033473'Oil feeding device for scroll fluid apparatus'19904,950,135'Piezoelectric powered scroll compressor'19904,867,649'Refrigerating system'19894,861,245'Scroll compressor with sealed pressure space biasing the orbiting scroll member'19894,801,248'Variable capacity swash plate compressor'19894,579,512'Scroll-type fluid machine with radial clearance between wraps'19864,555,224'Oil feeding device for scroll fluid apparatus'19854,496,296'Device for pressing orbiting scroll member in scroll type fluid machine'19854,475,360'Refrigeration system incorporating scroll type compressor'19844,473,343'Bearing device for scroll-type compressor'19844,464,100'Scroll fluid apparatus handling compressible fluid'19844,462,772'Oil feeding device for scroll fluid apparatus'19844,443,166'Scroll fluid apparatus with an arcuate recess adjacent the stationary wrap'19844,441,870'Scroll member'19844,417,863'Scroll member assembly of scroll-type fluid machine'19834,396,364'Scroll fluid apparatus with crankshaft bearing located in orbiting pin force plane'19834,384,831'Scroll-type fluid apparatus provided with means for counteracting a moment exerted on orbiting scroll member'19834,365,941'Scroll compressor provided with means for pressing an orbiting scroll member against a stationary scroll member and self-cooling means'19824,350,479'Scrool-type fluid machine with liquid-filled force-balanced pockets'19824,216,661'Scroll compressor with means for end plate bias and cooled gas return to sealed compressor spaces'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–2006Patents assigned to HITACHI LTD (43)· patent assignee history
1980–2002Based in Ibaraki, JP· patent location history
1982–1983Based in Oaza, JP· patent location history
1984–1997Based in Shimizu, JP· patent location history
1994–2016Based in Moriya, JP· patent location history
2005–2008Based in Shizuoka, JP· patent location history
2008–2016Patents assigned to HITACHI APPLIANCES INC (8)· patent assignee history
2008Patents assigned to HITACHI AIR CONDITIONING SYS (2)· patent assignee history
2012–2016Patents assigned to TOJO KENJI (3)· patent assignee history
2017–2019Patents assigned to TEIJIN PHARMA LTD (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD431980–2006
HITACHI APPLIANCES INC82008–2016
TEIJIN PHARMA LTD32017–2019
TOJO KENJIself32012–2016
HITACHI AIR CONDITIONING SYS22008
Locations
LocationPatentsSpan
Ibaraki, JP251980–2002
Moriya, JP151994–2016
Shimizu, JP101984–1997
Shizuoka, JP32005–2008
Oaza, JP31982–1983