Inventor

Yoshiro Koga

Inventor

Nagano, JP

Overview

1985–2021

Patent span

Physics

Primary field (CPC G)

Patents· 48 as inventor

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

G03Gprimary

G03GElectrography46%

B41JTypewriters15%

B82YSpecific uses or applications of nanostructures7%

G02BOptical elements, systems or apparatus4%

B65GTransport or storage devices, e.g. conveyors for loading or tipping, shop conveyor systems or pneumatic tube conveyors3%

G06KGraphical data reading3%

G07DHandling of coins or valuable papers, e.g. testing, sorting by denominations, counting, dispensing, changing or depositing3%

G11BInformation storage based on relative movement between record carrier and transducer3%

H02KDynamo-electric machines3%

H04NPictorial communication, e.g. television3%

PatentTitleYear

11,114,231Rotary solenoid2021 10,469,008Rotary solenoid drive control method2019 7,672,618'Image forming apparatus and method using liquid development in which toner density is determined based on patch image density'2010 7,636,101'MEMS scanner adapted to a laser printer'2009 7,457,568'Image forming apparatus and method using liquid development in which toner density is determined based on patch image density'2008 7,270,925'Image carrier and developing device incorporated in image forming apparatus'2007 7,174,111'Apparatus and method of transferring image on intermediate medium onto recording medium'2007 7,135,260'Imaging system'2006 7,082,271'Image forming apparatus and image forming method using liquid development'2006 7,062,202'Image forming apparatus and method using liquid development under an image forming condition in which an adhesion amount of toner is substantially saturated'2006 7,003,236'Liquid development apparatus, liquid development method, and image forming apparatus and image forming method using liquid development'2006 6,996,360'Apparatus and method of transferring image on intermediate medium onto recording medium'2006 6,873,802'Methods of verifying requirement for replacement of a main unit and of a component of image formation apparatus and judging advisability of recommendation for replacement'2005 6,825,867'Organic electroluminescent array exposure head, method of fabricating the same, and image forming apparatus using the same'2004 6,661,442'Image forming apparatus having writing electrodes for forming an electrostatic latent image'2003 6,650,349'Image forming apparatus having writing electrodes as a writing device'2003 6,618,065'Image forming apparatus having a plurality of writing electrodes'2003 6,532,031'Image forming apparatus with writing electrodes having a substantially semi-circular resistant layer'2003 6,526,238'Developing device'2003 6,518,990'Image forming apparatus for forming an electrostatic latent image on a latent image carrier'2003 6,515,692'Image forming apparatus having writing electrodes as a writing device'2003 6,473,107'Image forming apparatus'2002 6,326,992'Image forming apparatus'2001 5,987,294'Toner fixing apparatus'1999 5,893,665'Image forming apparatus'1999 5,870,132'Laser beam scanning image forming apparatus having two-dimensionally disposed light emitting portions'1999 5,729,804'Toner storage device and supply mechanism for image forming'1998 5,729,811'Contact transfer device and image forming equipment'1998 5,708,941'Developing apparatus using non-magnetic spherical toner particles'1998 5,697,033'Image forming apparatus with film transfer member'1997 5,655,197'Developing device'1997 5,645,966'Image forming method'1997 5,633,699'Structure for mounting a rotary member and image forming apparatus using same structure'1997 5,570,168'Development process'1996 5,563,693'Contact transfer device and image forming equipment'1996 5,557,060'Developing device'1996 5,537,191'Image forming apparatus with toner transport mechanism incorporated therein'1996 5,467,174'Apparatus for forming an image using an electrophotographic process'1995 5,438,395'Development process'1995 5,424,815'Developing device'1995 5,324,885'Roller member for an electrophotographic device'1994 5,214,239'Apparatus for forming an electrophotographic image having a novel toner carrier'1993 5,184,257'Head positioning control for a spindle motor disk drive'1993 5,149,914'Development apparatus using a flexible magnetic field forming layer'1992 5,023,733'Head positioning control for a spindle motor disk drive'1991 5,017,967'Method and apparatus for forming images including a toner transporting member having an insulating layer'1991 4,945,301'Constant-voltage power supply circuit and amplifier circuit and DA converter using the constant-voltage power supply circuit'1990 4,555,751'Rectified and smoothed DC supplying circuitry'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–1990Patents assigned to ONKYO KK (2)· patent assignee history

1991–2010Patents assigned to SEIKO EPSON CORP (43)· patent assignee history

1991–2019Based in Nagano, JP· patent location history

1991–2001Based in Suwa, JP· patent location history

2003Based in Nagano-shi, JP· patent location history

2009Patents assigned to MICROVISION INC (1)· patent assignee history

2009Based in Shiojiri, JP· patent location history

2019–2021Patents assigned to TAKANO CO LTD (2)· patent assignee history

2021Based in Kamiina-gun, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SEIKO EPSON CORP	43	1991–2010
ONKYO KK	2	1985–1990
TAKANO CO LTD	2	2019–2021
MICROVISION INC	1	2009

Locations

Location	Patents	Span
Nagano, JP	32	1991–2019
Suwa, JP	11	1991–2001
Kamiina-gun, JP	1	2021
Shiojiri, JP	1	2009
Nagano-shi, JP	1	2003