Inventor

Kazuhiro Wakamatsu

Inventor

Hitachi, JP

Overview

1985–2020

Patent span

Physics

Primary field (CPC G)

Patents· 40 as inventor

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

G03Gprimary

G03GElectrography48%

B26DCutting13%

B41JTypewriters11%

Y10TTechnical subjects covered by former us classification9%

B65HHandling thin or filamentary material, e.g. sheets, webs, cables7%

G06KGraphical data reading4%

H04NPictorial communication, e.g. television4%

LOC144%

F26BDrying solid materials or objects by removing liquid therefrom2%

PatentTitleYear

10,801,776Drying device and recording medium drying system2020 9,238,566'Sheet cutting device and image forming apparatus including the sheet cutting device'2016 9,004,390'Roll medium holding unit, roll sheet feeder, and image forming apparatus'2015 8,967,790'Sheet cutting device and image forming apparatus including the sheet cutting device'2015 8,967,028'Sheet cutting device and image forming apparatus including the sheet cutting device'2015 8,955,962'Image forming apparatus including sheet cutting device'2015 8,925,436'Sheet cutting device and image forming apparatus including the sheet cutting device'2015 8,764,182'Image forming apparatus including sheet cutting device'2014 8,657,402'Image forming apparatus including sheet cutting device'2014 8,593,651'Image forming apparatus with shortened conveyance path of sheet roll'2013 8,561,979'Open/close mechanism for paper tray for use in image forming apparatus'2013 8,131,197'Fixing device and electro photographic apparatus using the same'2012 8,118,296'Open/close mechanism for paper tray for use in image forming apparatus'2012 8,073,375'Fixing unit and image forming apparatus having the same'2011 7,758,040'Sheet feed cassette and image forming apparatus using the same'2010 7,731,170'Open/close mechanism for paper tray for use in image forming apparatus'2010 7,428,394'Electronic color photography apparatus'2008 7,298,981'Fixing device and image forming apparatus with guide having adjustable biasing angle'2007 7,292,805'Image forming apparatus having a sheet removal portion'2007 7,142,794'Image forming apparatus'2006 6,876,831'Image forming apparatus for conducting speed compensation by internal transcription belt cycle measurement'2005 6,760,564'Picture image forming apparatus with intermediate transfer belt trained around two rollers of different diameter'2004 6,697,586'Photoconductor unit and image forming system'2004 6,694,117'Color photographic apparatus'2004 6,661,994'Electrophotographic image forming system'2003 6,501,925'Photoconductor unit and image forming system'2002 6,381,428'Photoconductor unit and image forming system'2002 D0452703'Printer'2002 6,327,447'Electrophotographic apparatus having heat exhaustion device'2001 6,308,025'Electrophotography apparatus'2001 6,253,039'Color image forming apparatus'2001 D0437348'Printer'2001 6,181,889'Image forming apparatus with reduced latent image vibration caused by photosensitive belt joint'2001 6,081,683'Color electrophotographic apparatus with obliquely arranged photosensitive belt'2000 5,621,504'Toner transferring device'1997 5,373,354'Color electrophotographic device and method'1994 5,291,254'Electrophotographic recording apparatus'1994 5,113,226'Image transfer apparatus'1992 4,922,272'High precision image recording apparatus'1990 4,552,449'Compound image recording apparatus'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–2004Patents assigned to HITACHI LTD (19)· patent assignee history

1985–2011Based in Hitachi, JP· patent location history

2007–2013Based in Ibaraki, JP· patent location history

2011–2020Patents assigned to RICOH CO LTD (14)· patent assignee history

2011–2016Patents assigned to WAKAMATSU KAZUHIRO (13)· patent assignee history

2012–2020Based in Kanagawa, JP· patent location history

2013–2016Patents assigned to MAEYAMA YUICHIRO (8)· patent assignee history

2013–2016Patents assigned to OGAWA MASATO (8)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	19	1985–2004
RICOH CO LTD	14	2011–2020
WAKAMATSU KAZUHIROself	13	2011–2016
MAEYAMA YUICHIRO	8	2013–2016
OGAWA MASATO	8	2013–2016

Locations

Location	Patents	Span
Hitachi, JP	23	1985–2011
Kanagawa, JP	11	2012–2020
Ibaraki, JP	6	2007–2013