Inventor

Ikutaroh Nagatsuka

Inventor

Kanagawa, JP

Overview

32→

Patents

1988–2012

Patent span

Physics

Primary field (CPC G)

Patents· 32 as inventor

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

G03Gprimary

G03GElectrography52%

G11BInformation storage based on relative movement between record carrier and transducer10%

Y10TTechnical subjects covered by former us classification10%

G06FElectric digital data processing7%

G09GArrangements or circuits for control of indicating devices using static means to present variable information5%

A63FCard, board, or roulette games2%

B41JTypewriters2%

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

G03BApparatus or arrangements for taking photographs or for projecting or viewing them2%

G06KGraphical data reading2%

PatentTitleYear

8,089,647'Information processing device and method, and data communication system for acquiring document data from electronic paper'2012 7,924,238'Image forming apparatus with members that bring a light emitting device in proximity to a recording medium'2011 7,920,112'Electronic paper system, image processing apparatus for electronic paper system storage medium storing image processing program, and image writing method using image processing apparatus'2011 7,857,203'System for writing information and method of writing information'2010 7,793,847'Coin-shaped recording medium, recording medium processing device'2010 7,578,429'System for writing information and method of writing information'2009 7,576,760'Multi-level optical writer'2009 7,533,104'Information management system and information management method'2009 7,455,216'Printed-matter issuing managing system, printed-matter verifying device and contents managing device'2008 7,225,403'Display system with a display having a memory characteristic and a display having no memory characteristic, display method, and display program'2007 7,219,973'Image-forming device and method'2007 6,908,036'Display and record medium and information writer'2005 5,963,765'Method and device for developing an electrostatic latent image based on toner amount and image formation system using the developing device'1999 5,752,141'Rotating type developing apparatus'1998 5,629,120'Electrostatic image developing carrier and electrostatic image developer'1997 5,439,772'Magnetic toner and process for producing the same'1995 5,178,984'Electrophotographic toner'1993 5,176,979'Electrophotographic toner having a surface treated silica particle'1993 5,155,000'Toner composition containing TiO.sub.2 particles'1992 5,110,703'Carrier for developer'1992 5,106,715'Toner composition with polyethylene and inorganic external additive'1992 5,059,504'Carrier for developer'1991 5,013,626'Carrier of a magnetic powder dispersed type'1991 4,965,160'Electrophotographic developer carrier particles coated with binder resin'1990 4,929,528'Coated carrier for developer'1990 4,912,004'Carrier for developer'1990 4,902,597'Carrier for electrophotographic developer'1990 4,871,639'Carrier for electrophotographic developer'1989 4,868,083'Developer carrier and process for producing the same'1989 4,861,694'Process for producing carriers for developer'1989 4,859,558'Composition with fatty acid bisamide powder developer'1989 4,791,041'Magnetic carrier particles for electrophotographic developer'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988–2012Patents assigned to FUJI XEROX CO LTD (32)· patent assignee history

1988–1997Based in Minami-ashigara, JP· patent location history

1989Patents assigned to NIPPON IRON POWDER CO (2)· patent assignee history

1989–2011Based in Kanagawa, JP· patent location history

1998–2010Based in Ebina, JP· patent location history

2012Patents assigned to HIROSE YOSHITSUGU (1)· patent assignee history

2012Patents assigned to HOTTA HIROYUKI (1)· patent assignee history

2012Patents assigned to NAGATSUKA IKUTAROH (1)· patent assignee history

2012Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FUJI XEROX CO LTD	32	1988–2012
NIPPON IRON POWDER CO	2	1989
HIROSE YOSHITSUGU	1	2012
HOTTA HIROYUKI	1	2012
NAGATSUKA IKUTAROHself	1	2012

Locations

Location	Patents	Span
Kanagawa, JP	23	1989–2011
Ebina, JP	5	1998–2010
Minami-ashigara, JP	3	1988–1997
Tokyo, JP	1	2012