Inventor

Akitaka Yajima

Inventor

Suwa, JP

Overview

1989–2017

Patent span

Physics

Primary field (CPC G)

Patents· 50 as inventor

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

H04Nprimary

H04NPictorial communication, e.g. television33%

G02BOptical elements, systems or apparatus31%

G03BApparatus or arrangements for taking photographs or for projecting or viewing them17%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein12%

G09GArrangements or circuits for control of indicating devices using static means to present variable information3%

H05BElectric heating3%

A01GHorticulture1%

LOC261%

PatentTitleYear

9,794,535'Display device'2017 9,250,507'Projector'2016 RE041680'Projector'2010 RE040251'Optical element, polarization illumination device, and projector'2008 RE039859'Dichroic prism, prism unit, and projection display apparatus'2007 7,267,443'Light-modulating projector'2007 RE039702'Projector'2007 RE039243'Optical element, polarization illumination device, and projector'2006 RE039040'Projector'2006 7,006,004'Light-source lamp unit, light-source device and projection-type display apparatus'2006 RE038740'Dichroic prism and projection display apparatus'2005 6,894,845'System and methods for providing a zoom lens device'2005 6,856,375'Liquid crystal light valve and projection display device including the same'2005 6,778,228'Projection-type display apparatus'2004 6,690,282'Light-source lamp unit, light-source device and projection-type display apparatus'2004 6,669,345'Illumination system and projector'2003 6,652,104'Correction of image distortion'2003 6,637,886'Projection display device'2003 6,612,702'Projection display device'2003 RE038084'Projector'2003 6,540,360'Projector'2003 6,529,250'Projector'2003 6,523,962'Optical element suitable for projection display apparatus'2003 6,517,208'Illumination system and projector'2003 6,425,667'Projection lens unit and projector using the same'2002 6,404,550'Optical element suitable for projection display apparatus'2002 6,394,607'Polarized light separation device, method of fabricating the same and projection display apparatus using the polarized light separation device'2002 6,315,417'Projector'2001 6,309,073'Projector'2001 6,278,500'Liquid crystal device and projector display device having a specific relationship for the F-numbers of the illumination optical system'2001 6,268,799'Light-source lamp unit, light-source device and projection-type display apparatus and method of use'2001 6,247,817'Projector'2001 6,172,815'Dichroic prism and projection display apparatus'2001 6,142,634'Projector'2000 6,141,150'Dichroic prism, prism unit, and projection display apparatus'2000 6,120,152'Projection-type display apparatus'2000 RE036850'Projection-type display apparatus'2000 6,095,653'Projection-type display apparatus'2000 6,084,714'Polarizing illumination device and projection display device'2000 6,072,635'Dichroic prism and projection display apparatus'2000 D0420455'Replacement lamp for projector'2000 6,000,802'Projection-type display apparatus'1999 5,978,136'Optical element, polarization illumination device, and projection display apparatus'1999 5,909,944'Projection-type display apparatus'1999 5,865,521'Projection-type display apparatus'1999 5,743,610'Projection-type display apparatus'1998 5,626,409'Projection-type display apparatus'1997 5,191,450'Projection-type color display device having a driving circuit for producing a mirror-like image'1993 4,909,601'Projection-type color display device with light valves positioned at unequal distances from the light source'1990 4,850,685'Projection-type color display device'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–2017Patents assigned to SEIKO EPSON CORP (50)· patent assignee history

1989–2010Based in Suwa, JP· patent location history

2000–2017Based in Tatsuno-machi, JP· patent location history

2001Based in Tatuno, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SEIKO EPSON CORP	50	1989–2017

Locations

Location	Patents	Span
Suwa, JP	28	1989–2010
Tatsuno-machi, JP	21	2000–2017
Tatuno, JP	1	2001