Inventor
Eiji Kumagai
Inventor
Kanagawa, JP
Overview
33→
Patents
1991–2020
Patent span
General tagging of new technological developments
Primary field (CPC Y)
Patents· 33 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer20%
H02JElectric power networks15%
Y02TClimate change mitigation technologies related to transportation14%
B60LPropulsion of electrically-propelled vehicles11%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution9%
H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy7%
G01RMeasuring electric variables5%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems3%
Y10TTechnical subjects covered by former us classification3%
Y04SSystems integrating technologies related to power network operation, communication or information technologies for improving the electrical power generation, transmission, distribution, management or usage, i.e. smart grids2%
PatentTitleYear
10,587,127Charging device, charging control method, electricity storage device, power storage device, power system, and electric vehicle202010,008,862Power storage device, power storage system, and control method of power storage device20189,991,702Control device to boot up power source20189,966,759Battery monitor circuit, storage apparatus, electronic apparatus, electric-powered vehicle, and power system20189,929,559'Electricity storage device, electricity storage system, and method for controlling electricity storage device'20189,698,449'Storage system and output controller'20179,608,451'Electric power supplying apparatus, electric power supplying method, inverter, and electric vehicle'20179,608,464'Control device, electric storage system, electronic device, electric vehicle, and electric power system to boot up a power source'20179,419,458'Storage system, electronic device, electric vehicle and power system'20169,270,135'Power supply apparatus and power supply switching method'20169,178,366'Battery monitor circuit, storage apparatus, electronic apparatus, electric-powered vehicle, and power system'20159,034,511'Power storage apparatus, connection apparatus, power storage system, electronic device, motor-driven vehicle, and electric power system'20159,018,911'Electric circuit, charge control device, charge system, and control method'20158,907,624'Multi-battery pack battery system with direct communication between controller and the battery packs'20147,797,067'Production management program, production management method, and production management system'20107,379,406'Optical recording apparatus, and method for controlling laser power therein by filtering and then sampling a returned light signal'20087,274,631'Optical-disc driving apparatus, optical-disc driving method, storage medium, and program'20076,819,642'Data recording device, data reproducing device, and optical disc'20046,757,227'Optical drive apparatus for use with different recording media, tracking control method for use therein, and optical disc'20046,714,509'Disk recording medium and disk drive apparatus'20046,594,210'Disc drive apparatus and method for generating wobble information'20036,288,988'Optical disc device and optical disc discriminating method'20016,288,987'Optical disc device and optical disc discriminating method'20016,252,834'Optical disc device and optical disc discriminating method'20016,248,777'Remedies for peripheral circulation disturbances'20016,229,772'Optical disc device and optical disc discriminating method'20016,147,941'Optical disc device and optical disc discriminating method'20006,034,937'Optical disc reproduction method and optical disc reproduction apparatus'20006,034,934'Disc reproduction apparatus'20006,005,832'Optical disc device and optical disc discriminating method'19995,703,852'Optical disk reproducing apparatus having a cosine equalizer with boosted frequency characteristics'19975,636,196'Optical disc apparatus with selectively shiftable seek operation capture range'19975,003,523'Apparatus for recording and reproducing information on an optical disk with a focus servo system for avoiding influence of traverse signal during search'1991Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1991–2018Patents assigned to SONY CORP (28)· patent assignee history
1997–2018Based in Kanagawa, JP· patent location history
2001Patents assigned to CHUGAI PHARMACEUTICAL CO LTD (1)· patent assignee history
2004Based in Shinagawa-ku, JP· patent location history
2010Based in Kawasaki, JP· patent location history
2014–2017Patents assigned to KUMAGAI EIJI (7)· patent assignee history
2015Patents assigned to ADACHI TATSUYA (1)· patent assignee history
2017–2018Based in Fukushima, JP· patent location history
2018–2020Patents assigned to MURATA MANUFACTURING CO (5)· patent assignee history
2020Based in Ibaraki, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SONY CORP | 28 | 1991–2018 |
| KUMAGAI EIJIself | 7 | 2014–2017 |
| MURATA MANUFACTURING CO | 5 | 2018–2020 |
| ADACHI TATSUYA | 1 | 2015 |
| CHUGAI PHARMACEUTICAL CO LTD | 1 | 2001 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kanagawa, JP | 24 | 1997–2018 |
| Fukushima, JP | 3 | 2017–2018 |
| Ibaraki, JP | 1 | 2020 |
| Kawasaki, JP | 1 | 2010 |
| Shinagawa-ku, JP | 1 | 2004 |