Inventor
Kiyoshi Yamaguchi
Inventor
Kanagawa, JP
Overview
Patents· 63 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B41Jprimary
B41JTypewriters15%
Y10TTechnical subjects covered by former us classification8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
H02KDynamo-electric machines5%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution5%
G06FElectric digital data processing4%
G11BInformation storage based on relative movement between record carrier and transducer3%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form3%
C07KPeptides3%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them3%
PatentTitleYear
10,489,428Existing system processing specification extractor201910,339,035Test DB data generation apparatus201910,241,899Test input information search device and method20199,436,713'Database analyzer and database analysis method'20169,288,443'Broadcast content distribution system, and distribution apparatus and broadcast reception terminal device for use in the system'20169,233,519'Water-absorbent sheet structure'20169,187,580'Resin particle having many recesses on the surface thereof'20159,013,248'Filter circuit'20159,015,658'Automatic program generation device and automatic program generation method'20159,007,145'High-frequency signal balancing multiplexer'20158,977,103'Video data processing apparatus and video data processing method'20158,894,185'Liquid ejection head, ink cartridge, and image forming apparatus'20148,882,230'Liquid droplet ejecting head, ink cartridge, and image forming apparatus'20148,878,105'Steam cooker'20148,802,918'Water-absorbent sheet composition'20148,777,382'Inkjet head and image forming device'20148,708,459'Droplet ejection head, method of manufacturing droplet ejection head, and droplet ejection apparatus'20148,657,418'Inkjet head and recording device'20148,646,870'Inkjet recording apparatus'20148,556,396'Inkjet head and inkjet recording device'20138,491,103'Inkjet head'20138,468,569'Content delivery system and method, and server apparatus and receiving apparatus used in this content delivery system'20138,414,110'Inkjet head'20138,197,048'Image forming apparatus'20128,047,637'Piezoelectric actuator and manufacturing method thereof, liquid ejecting head, and image forming apparatus'20118,042,458'Heating cooker and tray therefor'20117,764,006'Piezoelectric actuator and manufacturing method thereof, liquid ejecting head, and image forming apparatus'20107,665,830'Liquid discharge head, liquid discharge device, and image forming device'20107,364,253'Liquid drop jet head, ink cartridge and ink jet recording apparatus'20087,103,845'Terminal apparatus for operator and communication path setting method'20066,913,348'Liquid drop jet head, ink cartridge and ink jet recording apparatus'20056,853,388'Network management equipment and communication path setting method'20056,849,983'Rotary machine having bypath magnetic path blocking magnetic barrier'20056,740,383'Magnetic recording medium possessing a ratio of Hc(perpendicular) to Hc(horizontal) that is not more than 0.22 and magnetic recording disk device'20046,729,716'Liquid drop jet head and ink jet recording apparatus'20046,682,185'Liquid drop jet head, ink cartridge and ink jet recording apparatus'20046,509,108'Magnetic recording medium and a magnetic disc apparatus, with a CRP or CrMoP reinforcing coat layer'20036,377,767'Toner agitating and transporting member of a toner cartridge and developing device'20026,093,603'Fabricating semiconductor memory devices with improved cell isolation'20005,952,691'Non-volatile electrically alterable semiconductor memory device'19995,914,168'Magnetic recording medium and magnetic disc device'19995,598,710'Superconducting apparatus and method for operating said superconducting apparatus'19975,550,391'Light-emitting diode and light-emitting diode array'19965,515,746'Traveling driving device for a bicycle'19965,260,586'Optical exclusive-or element'19935,107,524'Synchrotron radiation utilizing apparatus and method for utilizing synchrotron radiation'19925,067,993'Magnetic core material made of Fe-Co base alloy for high frequencies'19914,996,496'Bending magnet'19914,876,567'CRT printing method and apparatus for making a print of an image with letters'1989D0302793'Combined container closure and spoon'19894,817,023'Slide magazine provided with memory means for slide film printing system'19894,697,796'Suspension device'19874,680,261'Process for producing interferon'19874,602,865'Method for sorting out slide films in a magazine system'19864,560,182'Bicycle'19854,548,900'Method of interferon production'19854,465,622'Method for purifying interferon'19844,448,042'Coolant supply and discharge device for superconductive rotor'19844,393,429'Superconductive coil system with protecting device'19834,392,293'Method of assembling combination shock absorber and air spring'19834,389,585'Superconductive rotor'19834,171,494'Electric rotary machine having superconducting rotor'19794,085,343'Rotor for a rotary electrical machine having a superconductive field winding'1978Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1978–2019Patents assigned to HITACHI LTD (14)· patent assignee history
1978–1991Based in Hitachi, JP· patent location history
1985–2016Patents assigned to YAMAGUCHI KIYOSHI (22)· patent assignee history
1987–2014Based in Kanagawa, JP· patent location history
1993–2010Patents assigned to RICOH KK (10)· patent assignee history
2005–2016Based in Hino, JP· patent location history
2011–2014Patents assigned to RICOH CO LTD (11)· patent assignee history
2013–2014Patents assigned to KATO MASAKI (7)· patent assignee history
2014–2016Based in Himeji, JP· patent location history
2016–2019Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| YAMAGUCHI KIYOSHIself | 22 | 1985–2016 |
| HITACHI LTD | 14 | 1978–2019 |
| RICOH CO LTD | 11 | 2011–2014 |
| RICOH KK | 10 | 1993–2010 |
| KATO MASAKI | 7 | 2013–2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kanagawa, JP | 20 | 1987–2014 |
| Hino, JP | 5 | 2005–2016 |
| Hitachi, JP | 5 | 1978–1991 |
| Tokyo, JP | 4 | 2016–2019 |
| Himeji, JP | 3 | 2014–2016 |