Inventor

Shinji Yamakawa

Inventor

Kawasaki, JP

Overview

1990–2018

Patent span

Electricity

Primary field (CPC H)

Patents· 25 as inventor

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

H04Nprimary

H04NPictorial communication, e.g. television49%

G06TImage data processing or generation, in general12%

G06VImage or video recognition or understanding12%

G07DHandling of coins or valuable papers, e.g. testing, sorting by denominations, counting, dispensing, changing or depositing5%

B41JTypewriters2%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein2%

G03GElectrography2%

G06KGraphical data reading2%

G09GArrangements or circuits for control of indicating devices using static means to present variable information2%

H01LSemiconductor devices2%

PatentTitleYear

10,153,244Display Device2018 8,917,903'Image inspection apparatus, image forming apparatus, image inspection method, and image inspection program'2014 8,810,861'Image processing apparatus, image noise detecting method, and computer-readable recording medium which averages pixel values of multiple pixels aligned in the sub-scanning direction'2014 8,538,086'Image inspection apparatus, image inspection method, and computer program product'2013 8,374,432'Image processing apparatus, image forming apparatus, image processing method, and computer program product'2013 8,055,084'Image processing device, image compression method, image compression program, and recording medium'2011 7,663,783'Image-processing device processing image data by judging a detected and expanded medium-density field as a non-character edge field'2010 7,139,100'Image-processing device processing image data by judging a detected and expanded medium-density field as a non-character edge field'2006 7,085,013'Image processing apparatus including low-linear-density dot region detection unit, and image forming apparatus including the same'2006 6,965,695'Method and system for processing character edge area data'2005 6,655,861'Image processing apparatus including low-linear-density dot region detection unit, and image forming apparatus including the same'2003 6,272,248'Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system'2001 6,014,462'Image processing apparatus and method for distinguishing alphanumeric symbols on a white background and those on a mesh pattern and individually processing such image data'2000 5,892,595'Image reading apparatus for correct positioning of color component values of each picture element'1999 5,862,434'Method and apparatus for forming an image on an image transfer medium and a method of forming an image using the image transfer medium'1999 5,809,366'Method and system for calibrating a color copier'1998 5,801,844'Image processing apparatus'1998 5,751,854'Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system'1998 5,565,993'Image processing apparatus for flexibly changing image data using a selective addressing scheme on a memory storing the image data'1996 5,465,160'Composite image forming apparatus for automatically combining document and image characters'1995 5,444,518'Image forming apparatus which adds identification information to recorded images to prevent forgery'1995 5,333,211'Image processing apparatus for preventing occurrence of moire in a reconstructed image'1994 5,206,718'Color image processor for creating shadows and masks'1993 5,204,752'Image processing apparatus having shadow composition capability using binary data thinning and thickening circuits and preset thinning and thickening width data'1993 4,942,542'Image processing computer system optimized to reduce idle time of computer'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990Patents assigned to DAINIPPON SCREEN MFG (1)· patent assignee history

1990Based in Kyoto, JP· patent location history

1993–2010Patents assigned to RICOH KK (18)· patent assignee history

1993–2001Based in Kawasaki, JP· patent location history

1999–2014Based in Kanagawa, JP· patent location history

2005–2018Based in Tokyo, JP· patent location history

2011–2014Patents assigned to RICOH CO LTD (5)· patent assignee history

2013–2014Patents assigned to YAMAKAWA SHINJI (4)· patent assignee history

2018Patents assigned to JAPAN DISPLAY INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
RICOH KK	18	1993–2010
RICOH CO LTD	5	2011–2014
YAMAKAWA SHINJIself	4	2013–2014
DAINIPPON SCREEN MFG	1	1990
JAPAN DISPLAY INC	1	2018

Locations

Location	Patents	Span
Kawasaki, JP	12	1993–2001
Kanagawa, JP	10	1999–2014
Tokyo, JP	2	2005–2018
Kyoto, JP	1	1990