Inventor
MINEFUJI NOBUTAKA
JP54 patents
⚠️ This page may combine multiple inventors who share the name “MINEFUJI NOBUTAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ASAHI OPTICAL CO LTD
21 patentsUS5442413AAug 15, 1995
Pupil conjugate-coupling device in projecting optical system
ASAHI OPTICAL CO LTD127 citations97
US6396627B1May 28, 2002
Stereoscopic microscope including zoom and relay optical systems
ASAHI OPTICAL CO LTD76 citations96
US5305029AApr 19, 1994
Projector
ASAHI OPTICAL CO LTD22 citations93
US5283599AFeb 1, 1994
Apparatus for combining and projecting images
ASAHI OPTICAL CO LTD40 citations93
US5278698AJan 11, 1994
Magnifying projecting lens
ASAHI OPTICAL CO LTD37 citations93
US4832465AMay 23, 1989
Zoom lens for use in copying
ASAHI OPTICAL CO LTD25 citations93
US6181487B1Jan 30, 2001
Photographic lens
ASAHI OPTICAL CO LTD15 citations84
US5155629AOct 13, 1992
Zoom lens system
ASAHI OPTICAL CO LTD19 citations82
US6181488B1Jan 30, 2001
Photographic lens
ASAHI OPTICAL CO LTD9 citations74
US5363243ANov 8, 1994
Zoom lens system
ASAHI OPTICAL CO LTD14 citations74
US5291241AMar 1, 1994
Optical device
ASAHI OPTICAL CO LTD15 citations74
US5260833ANov 9, 1993
Zoom lens system
ASAHI OPTICAL CO LTD19 citations74
US5066987ANov 19, 1991
Shading board for copying apparatus
ASAHI OPTICAL CO LTD9 citations74
US4964696AOct 23, 1990
Color separating optical apparatus
ASAHI OPTICAL CO LTD7 citations74
US4913540AApr 3, 1990
Telecentric projection lens system
ASAHI OPTICAL CO LTD14 citations74
US4825252AApr 25, 1989
Color zoom copying apparatus
ASAHI OPTICAL CO LTD11 citations74
US4813773AMar 21, 1989
Copying zoom lens
ASAHI OPTICAL CO LTD15 citations74
US6344931B1Feb 5, 2002
Zoom lens system
ASAHI OPTICAL CO LTD4 citations63
US5645334AJul 8, 1997
Projector and focusing method therein
ASAHI OPTICAL CO LTD6 citations63
US5504625AApr 2, 1996
Variable power projection lens
ASAHI OPTICAL CO LTD4 citations63
US5015079AMay 14, 1991
Copying lens system
ASAHI OPTICAL CO LTD6 citations63
SEIKO EPSON CORP
20 patentsUS8014075B2Sep 6, 2011
Projection type image display device
SEIKO EPSON CORP17 citations84
US7957078B2Jun 7, 2011
Projection optical system and projection type image display device
SEIKO EPSON CORP13 citations84
US7855840B2Dec 21, 2010
Projection zoom lens and projection type image display device
SEIKO EPSON CORP10 citations84
US10539766B2Jan 21, 2020
Projection optical system and projection image display device
SEIKO EPSON CORP8 citations83
US10534252B2Jan 14, 2020
Projection optical system and projector
SEIKO EPSON CORP4 citations73
US10466452B2Nov 5, 2019
Projection optical system and projector
SEIKO EPSON CORP4 citations73
US9671598B2Jun 6, 2017
Projection optical system
SEIKO EPSON CORP3 citations73
US9645362B2May 9, 2017
Projection optical system
SEIKO EPSON CORP2 citations73
US8794772B2Aug 5, 2014
Proximity projector having a dust-proof cover with an anti-reflection film
SEIKO EPSON CORP5 citations73
US12007678B2Jun 11, 2024
Projection system and projector with first optical system and second optical system
SEIKO EPSON CORP2 citations69
US11550132B2Jan 10, 2023
Projection optical system and projector
SEIKO EPSON CORP0 citations63
US10824059B2Nov 3, 2020
Projection system and projection-type image display apparatus
SEIKO EPSON CORP1 citations63
US7667898B2Feb 23, 2010
Zoom lens and projector
SEIKO EPSON CORP4 citations63
US12560784B2Feb 24, 2026
Projection system and projector
SEIKO EPSON CORP0 citations52
US11061308B2Jul 13, 2021
Projection optical system and projector
SEIKO EPSON CORP0 citations52
US10203487B2Feb 12, 2019
Imaging lens system, imaging apparatus and projector
SEIKO EPSON CORP0 citations52
US10156708B2Dec 18, 2018
Projection zoom lens and projection type image display device
SEIKO EPSON CORP1 citations52
US9810976B2Nov 7, 2017
Projection optical system
SEIKO EPSON CORP0 citations52
US9110277B2Aug 18, 2015
Projection zoom lens
SEIKO EPSON CORP0 citations52
US12235465B2Feb 25, 2025
Projection system and projector
SEIKO EPSON CORP0 citations51
PENTAX CORP
4 patentsNAGAREKAWA SATORU
2 patentsCASIO COMPUTER CO LTD
1 patentMINEFUJI NOBUTAKA
1 patentMORIKUNI EIJI
1 patentShowing the top 50 of 54 patents by PatentIndex Score.