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Inventor

Nobutaka Minefuji

Inventor
Azumino, JP

Overview

49→
Patents
1989–2021
Patent span
Physics
Primary field (CPC G)

Patents· 49 as inventor

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

G02Bprimary
G02BOptical elements, systems or apparatus59%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them26%
H04NPictorial communication, e.g. television9%
G03GElectrography6%
PatentTitleYear
11,061,308Projection optical system and projector202110,824,059Projection system and projection-type image display apparatus202010,802,389Projection system and projection-type image display apparatus202010,539,766Projection optical system and projection image display device202010,534,252Projection optical system and projector202010,466,452Projection optical system and projector201910,203,487Imaging lens system, imaging apparatus and projector201910,156,708Projection zoom lens and projection type image display device20189,885,943'Projection lens and projector'20189,810,976'Projection optical system'20179,798,125'Projection optical system and projector'20179,671,598'Projection optical system'20179,645,483'Projection optical system'20179,645,362'Projection optical system'20179,110,277'Projection zoom lens'20158,794,772'Proximity projector having a dust-proof cover with an anti-reflection film'20148,434,878'Proximity projector with a transmissive cover with modified reflectance properties'20138,164,838'Projection optical system and projection type image display device'20128,157,386'Projector'20128,113,664'Projector'20128,014,075'Projection type image display device'20117,957,078'Projection optical system and projection type image display device'20117,855,840'Projection zoom lens and projection type image display device'20107,667,898'Zoom lens and projector'20107,307,799'Imaging optical system'20076,906,868'Zoom lens system'20056,781,768'Zoom len system'20046,597,513'Zoom lens system'20036,396,627'Stereoscopic microscope including zoom and relay optical systems'20026,344,931'Zoom lens system'20026,181,488'Photographic lens'20016,181,487'Photographic lens'20015,645,334'Projector and focusing method therein'19975,600,488'Projection lens assembly and projector'19975,504,625'Variable power projection lens'19965,442,413'Pupil conjugate-coupling device in projecting optical system'19955,305,029'Projector'19945,291,241'Optical device'19945,283,599'Apparatus for combining and projecting images'19945,278,698'Magnifying projecting lens'19945,260,833'Zoom lens system'19935,155,629'Zoom lens system'19925,066,987'Shading board for copying apparatus'19915,015,079'Copying lens system'19914,964,696'Color separating optical apparatus'19904,913,540'Telecentric projection lens system'19904,832,465'Zoom lens for use in copying'19894,825,252'Color zoom copying apparatus'19894,813,773'Copying zoom lens'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–2002Patents assigned to ASAHI OPTICAL CO LTD (21)· patent assignee history
1989–1997Based in Tokyo, JP· patent location history
2001–2007Based in Saitama, JP· patent location history
2003–2007Patents assigned to PENTAX CORP (4)· patent assignee history
2010–2021Patents assigned to SEIKO EPSON CORP (24)· patent assignee history
2010–2020Based in Azumino, JP· patent location history
2010Based in Asumino, JP· patent location history
2012–2013Patents assigned to MINEFUJI NOBUTAKA (4)· patent assignee history
2012–2013Patents assigned to MORIKUNI EIJI (3)· patent assignee history
2020–2021Based in Omachi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SEIKO EPSON CORP242010–2021
ASAHI OPTICAL CO LTD211989–2002
MINEFUJI NOBUTAKAself42012–2013
PENTAX CORP42003–2007
MORIKUNI EIJI32012–2013
Locations
LocationPatentsSpan
Azumino, JP202010–2020
Tokyo, JP141989–1997
Saitama, JP82001–2007
Omachi, JP32020–2021
Asumino, JP12010