Yoshitomo Kumai

Person

Okaya, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Polarization device, method of manufacturing the same, liquid cryst...
- Patent number RE49885
- Issue date Mar 26, 2024
- Seiko Epson Corporation
- Yoshitomo Kumai
Information Patent Grant
Projector
- Patent number 11,762,271
- Issue date Sep 19, 2023
- Seiko Epson Corporation
- Junichi Wakabayashi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Polarizing element, liquid crystal apparatus and electronic apparatus
- Patent number 11,346,990
- Issue date May 31, 2022
- Seiko Epson Corporation
- Yoshitomo Kumai
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Display device and reflective polarizing element
- Patent number 10,877,363
- Issue date Dec 29, 2020
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Wire grid polarization element and electronic device
- Patent number 10,866,349
- Issue date Dec 15, 2020
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Method of manufacturing wire grid polarization element
- Patent number 10,859,744
- Issue date Dec 8, 2020
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Wire grid polarization element and projection type display apparatus
- Patent number 10,503,005
- Issue date Dec 10, 2019
- Seiko Epson Corporation
- Mitsutaka Ohori
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical element, method for manufacturing the same, and electronic...
- Patent number 10,386,557
- Issue date Aug 20, 2019
- Seiko Epson Corporation
- Yoshitomo Kumai
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Polarization device, method of manufacturing the same, liquid cryst...
- Patent number RE47179
- Issue date Dec 25, 2018
- Seiko Epson Corporation
- Yoshitomo Kumai
Information Patent Grant
Optical element, method for manufacturing the same, and electronic...
- Patent number 9,977,168
- Issue date May 22, 2018
- Seiko Epson Corporation
- Yoshitomo Kumai
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Polarization device, method of manufacturing the same, liquid cryst...
- Patent number RE45993
- Issue date May 3, 2016
- Seiko Epson Corporation
- Yoshitomo Kumai
- 001 -
Information Patent Grant
Method for producing polarizing element
- Patent number 9,201,170
- Issue date Dec 1, 2015
- Seiko Epson Corporation
- Yoshitomo Kumai
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Polarizer, polarizer producing process, projector, liquid crystal d...
- Patent number 9,164,307
- Issue date Oct 20, 2015
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Method for producing polarizing element
- Patent number 8,771,530
- Issue date Jul 8, 2014
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Polarizing element, liquid crystal device, and electronic apparatus
- Patent number 8,724,056
- Issue date May 13, 2014
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Polarization element comprising a plurality of metal protruding sec...
- Patent number 8,687,151
- Issue date Apr 1, 2014
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Optical element, method for manufacturing the same, liquid crystal...
- Patent number 8,619,215
- Issue date Dec 31, 2013
- Seiko Epson Corporation
- Yoshitomo Kumai
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Polarization element, projector, liquid crystal device, electronic...
- Patent number 8,593,593
- Issue date Nov 26, 2013
- Seiko Epson Corporation
- Yoshitomo Kumai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method for producing polarizing element
- Patent number 8,567,215
- Issue date Oct 29, 2013
- Seiko Epson Corporation
- Yoshitomo Kumai
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method for producing polarizing element
- Patent number 8,549,880
- Issue date Oct 8, 2013
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Polarizing element and method for manufacturing the same, projectio...
- Patent number 8,488,070
- Issue date Jul 16, 2013
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Polarizing element, method for producing same, liquid crystal devic...
- Patent number 8,471,984
- Issue date Jun 25, 2013
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Polarizing element, method for producing same, liquid crystal devic...
- Patent number 8,467,017
- Issue date Jun 18, 2013
- Seiko Epson Corporation
- Yoshitomo Kumai
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Polarization device, method of manufacturing the same, liquid cryst...
- Patent number 8,416,371
- Issue date Apr 9, 2013
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Polarization element and projection display device
- Patent number 8,205,992
- Issue date Jun 26, 2012
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Polarization element, method for manufacturing the same, liquid cry...
- Patent number 8,094,373
- Issue date Jan 10, 2012
- Seiko Epson Corporation
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Grant
Polarizing element, polarizing element manufacturing method, liquid...
- Patent number 7,969,534
- Issue date Jun 28, 2011
- Seiko Epson Corporation
- Huiping Zhang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Polarizing device, method for manufacturing the same, liquid crysta...
- Patent number 7,894,020
- Issue date Feb 22, 2011
- Seiko Epson Corporation
- Yoshitomo Kumai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Polarizing element, polarizing element manufacturing method, liquid...
- Patent number 7,755,717
- Issue date Jul 13, 2010
- Seiko Epson Corporation
- Huiping Zhang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method for manufacturing optical element
- Patent number 7,666,468
- Issue date Feb 23, 2010
- Seiko Epson Corporation
- Yoshitomo Kumai
- B82 - NANO-TECHNOLOGY

Patents Applicationslast 30 patents

Information Patent Application
METHOD FOR MANUFACTURING PHOTONIC CRYSTAL AND METHOD FOR MANUFACTUR...
- Publication number 20240283220
- Publication date Aug 22, 2024
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
PROCESSING HEAD AND LASER PROCESSING APPARATUS
- Publication number 20230307892
- Publication date Sep 28, 2023
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Application
PROJECTOR
- Publication number 20220308437
- Publication date Sep 29, 2022
- SEIKO EPSON CORPORATION
- Junichi WAKABAYASHI
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Light Emitting Device And Projector
- Publication number 20210296529
- Publication date Sep 23, 2021
- SEIKO EPSON CORPORATION
- Hiroaki JIROKU
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
DISPLAY DEVICE AND REFLECTIVE POLARIZING ELEMENT
- Publication number 20200192209
- Publication date Jun 18, 2020
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
POLARIZING ELEMENT, LIQUID CRYSTAL APPARATUS AND ELECTRONIC APPARATUS
- Publication number 20200103575
- Publication date Apr 2, 2020
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
METHOD OF MANUFACTURING WIRE GRID POLARIZATION ELEMENT
- Publication number 20190196079
- Publication date Jun 27, 2019
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
WIRE GRID POLARIZATION ELEMENT AND ELECTRONIC DEVICE
- Publication number 20190196080
- Publication date Jun 27, 2019
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
POLARIZATION DEVICE, METHOD OF MANUFACTURING THE SAME, LIQUID CRYST...
- Publication number 20190072817
- Publication date Mar 7, 2019
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
WIRE GRID POLARIZATION ELEMENT AND PROJECTION TYPE DISPLAY APPARATUS
- Publication number 20180267357
- Publication date Sep 20, 2018
- SEIKO EPSON CORPORATION
- Mitsutaka OHORI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL ELEMENT, METHOD FOR MANUFACTURING THE SAME, AND ELECTRONIC...
- Publication number 20180239071
- Publication date Aug 23, 2018
- SEIKO EPSON CORPORATION
- Yoshitomo Kumai
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
OPTICAL ELEMENT, METHOD FOR MANUFACTURING THE SAME, AND ELECTRONIC...
- Publication number 20170045658
- Publication date Feb 16, 2017
- SEIKO EPSON CORPORATION
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Application
METHOD FOR PRODUCING POLARIZING ELEMENT, POLARIZING ELEMENT, LIQUID...
- Publication number 20140293196
- Publication date Oct 2, 2014
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
METHOD FOR PRODUCING POLARIZING ELEMENT
- Publication number 20130228549
- Publication date Sep 5, 2013
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
METHOD FOR PRODUCING POLARIZING ELEMENT
- Publication number 20130227992
- Publication date Sep 5, 2013
- SEIKO EPSON CORPORATION
- Yoshitomo Kumai
- G02 - OPTICS
Information Patent Application
POLARIZER, POLARIZER PRODUCING PROCESS, PROJECTOR, LIQUID CRYSTAL D...
- Publication number 20130120672
- Publication date May 16, 2013
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
POLARIZING ELEMENT, LIQUID CRYSTAL DEVICE, AND ELECTRONIC APPARATUS
- Publication number 20130002999
- Publication date Jan 3, 2013
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
METHOD FOR PRODUCING POLARIZING ELEMENT
- Publication number 20120237674
- Publication date Sep 20, 2012
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
METHOD FOR PRODUCING POLARIZING ELEMENT
- Publication number 20120234046
- Publication date Sep 20, 2012
- SEIKO EPSON CORPORATION
- Yoshitomo Kumai
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
POLARIZATION ELEMENT, PROJECTOR, LIQUID CRYSTAL DEVICE, ELECTRONIC...
- Publication number 20120105745
- Publication date May 3, 2012
- SEIKO EPSON CORPORATION
- Yoshitomo Kumai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
POLARIZATION DEVICE, METHOD OF MANUFACTURING THE SAME, LIQUID CRYST...
- Publication number 20110310329
- Publication date Dec 22, 2011
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
POLARIZATION DEVICE, METHOD OF MANUFACTURING THE SAME, LIQUID CRYST...
- Publication number 20110310328
- Publication date Dec 22, 2011
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
POLARIZATION ELEMENT, LIQUID CRYSTAL DEVICE, ELECTRONIC DEVICE, AND...
- Publication number 20110102712
- Publication date May 5, 2011
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
POLARIZING ELEMENT, POLARIZING ELEMENT MANUFACTURING METHOD, LIQUID...
- Publication number 20100238385
- Publication date Sep 23, 2010
- SEIKO EPSON CORPORATION
- Huiping ZHANG
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
METHOD OF MANUFACTURING POLARIZATION ELEMENT
- Publication number 20100227054
- Publication date Sep 9, 2010
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
POLARIZATION ELEMENT AND PROJECTION DISPLAY DEVICE
- Publication number 20100225886
- Publication date Sep 9, 2010
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
POLARIZING ELEMENT AND METHOD FOR MANUFACTURING THE SAME, PROJECTIO...
- Publication number 20100225832
- Publication date Sep 9, 2010
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
POLARIZING ELEMENT, METHOD FOR PRODUCING SAME, LIQUID CRYSTAL DEVIC...
- Publication number 20100149441
- Publication date Jun 17, 2010
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS
Information Patent Application
POLARIZING ELEMENT, METHOD FOR PRODUCING SAME, LIQUID CRYSTAL DEVIC...
- Publication number 20100149443
- Publication date Jun 17, 2010
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Application
OPTICAL ELEMENT, METHOD FOR MANUFACTURING THE SAME, LIQUID CRYSTAL...
- Publication number 20090135355
- Publication date May 28, 2009
- SEIKO EPSON CORPORATION
- Yoshitomo KUMAI
- G02 - OPTICS

Yoshitomo Kumai

Person

Patents Grantslast 30 patents

Polarization device, method of manufacturing the same, liquid cryst...

Projector

Polarizing element, liquid crystal apparatus and electronic apparatus

Display device and reflective polarizing element

Wire grid polarization element and electronic device

Method of manufacturing wire grid polarization element

Wire grid polarization element and projection type display apparatus

Optical element, method for manufacturing the same, and electronic...

Polarization device, method of manufacturing the same, liquid cryst...

Optical element, method for manufacturing the same, and electronic...

Polarization device, method of manufacturing the same, liquid cryst...

Method for producing polarizing element

Polarizer, polarizer producing process, projector, liquid crystal d...

Method for producing polarizing element

Polarizing element, liquid crystal device, and electronic apparatus

Polarization element comprising a plurality of metal protruding sec...

Optical element, method for manufacturing the same, liquid crystal...

Polarization element, projector, liquid crystal device, electronic...

Method for producing polarizing element

Method for producing polarizing element

Polarizing element and method for manufacturing the same, projectio...

Polarizing element, method for producing same, liquid crystal devic...

Polarizing element, method for producing same, liquid crystal devic...

Polarization device, method of manufacturing the same, liquid cryst...

Polarization element and projection display device

Polarization element, method for manufacturing the same, liquid cry...

Polarizing element, polarizing element manufacturing method, liquid...

Polarizing device, method for manufacturing the same, liquid crysta...

Polarizing element, polarizing element manufacturing method, liquid...

Method for manufacturing optical element

Patents Applicationslast 30 patents

METHOD FOR MANUFACTURING PHOTONIC CRYSTAL AND METHOD FOR MANUFACTUR...

PROCESSING HEAD AND LASER PROCESSING APPARATUS

PROJECTOR

Light Emitting Device And Projector

DISPLAY DEVICE AND REFLECTIVE POLARIZING ELEMENT

POLARIZING ELEMENT, LIQUID CRYSTAL APPARATUS AND ELECTRONIC APPARATUS

METHOD OF MANUFACTURING WIRE GRID POLARIZATION ELEMENT

WIRE GRID POLARIZATION ELEMENT AND ELECTRONIC DEVICE

POLARIZATION DEVICE, METHOD OF MANUFACTURING THE SAME, LIQUID CRYST...

WIRE GRID POLARIZATION ELEMENT AND PROJECTION TYPE DISPLAY APPARATUS

OPTICAL ELEMENT, METHOD FOR MANUFACTURING THE SAME, AND ELECTRONIC...

OPTICAL ELEMENT, METHOD FOR MANUFACTURING THE SAME, AND ELECTRONIC...

METHOD FOR PRODUCING POLARIZING ELEMENT, POLARIZING ELEMENT, LIQUID...

METHOD FOR PRODUCING POLARIZING ELEMENT

METHOD FOR PRODUCING POLARIZING ELEMENT

POLARIZER, POLARIZER PRODUCING PROCESS, PROJECTOR, LIQUID CRYSTAL D...

POLARIZING ELEMENT, LIQUID CRYSTAL DEVICE, AND ELECTRONIC APPARATUS

METHOD FOR PRODUCING POLARIZING ELEMENT

METHOD FOR PRODUCING POLARIZING ELEMENT

POLARIZATION ELEMENT, PROJECTOR, LIQUID CRYSTAL DEVICE, ELECTRONIC...

POLARIZATION DEVICE, METHOD OF MANUFACTURING THE SAME, LIQUID CRYST...

POLARIZATION DEVICE, METHOD OF MANUFACTURING THE SAME, LIQUID CRYST...

POLARIZATION ELEMENT, LIQUID CRYSTAL DEVICE, ELECTRONIC DEVICE, AND...

POLARIZING ELEMENT, POLARIZING ELEMENT MANUFACTURING METHOD, LIQUID...

METHOD OF MANUFACTURING POLARIZATION ELEMENT

POLARIZATION ELEMENT AND PROJECTION DISPLAY DEVICE

POLARIZING ELEMENT AND METHOD FOR MANUFACTURING THE SAME, PROJECTIO...

POLARIZING ELEMENT, METHOD FOR PRODUCING SAME, LIQUID CRYSTAL DEVIC...

POLARIZING ELEMENT, METHOD FOR PRODUCING SAME, LIQUID CRYSTAL DEVIC...

OPTICAL ELEMENT, METHOD FOR MANUFACTURING THE SAME, LIQUID CRYSTAL...