LexDanaLexDanabeta
Inventor

Yoshihiro Kumagai

Inventor
Yokohama, JP

Overview

20→
Patents
1987–2021
Patent span
Physics
Primary field (CPC G)

Patents· 20 as inventor

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

G03Bprimary
G03BApparatus or arrangements for taking photographs or for projecting or viewing them16%
G02BOptical elements, systems or apparatus13%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein8%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds5%
G01DMeasuring not specially adapted for a specific variable5%
G01MTesting static or dynamic balance of machines or structures5%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light5%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h105%
Y10TTechnical subjects covered by former us classification5%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations3%
PatentTitleYear
11,047,067Crystal laminate structure20219,221,214'Method for producing concave-convex substrate using sol-gel method, sol used in same, method for producing organic EL element using same, and organic EL element obtained thereby'20159,109,977'Optical fiber characteristics measurement device and method'20158,724,101'Optical fiber characteristic measuring device and method'20147,136,224'Rear projection screen with shifted lens'20067,061,676'Rear projection screen and rear projection display apparatus'20067,019,804'Liquid crystal cell with twist angle from 180 to 270 degrees and twisted optical compensating element'20066,750,941'Complex diffraction device'20046,628,369'Circular polarizer and liquid crystal display'20036,327,089'Laminated transparent structure for reflective display'20016,292,295'Rear projection screen incorporating a prism'20016,282,034'Optical device and Fresnel lens sheet'20016,210,872'Optical film'20016,108,465'Optical pulse generator'20006,101,021'Optical pulse generator'20005,724,188'Lenticular lens sheet'19985,432,249'Liquid crystalline polyesters'19955,432,636'Rear-projection screen'19954,909,777'Tensioner or toothed belts'19904,678,801'Novel 2-oxopyrrolidine compounds, salts thereof process for the preparation thereof as well as pharmaceutical agent comprising the compound'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1995–2006Patents assigned to KURARAY CO (6)· patent assignee history
1995–2015Based in Yokohama, JP· patent location history
1995–2006Based in Niigata, JP· patent location history
2000Patents assigned to ANDO ELECTRIC (2)· patent assignee history
2000–2021Based in Tokyo, JP· patent location history
2001–2004Patents assigned to NIPPON MITSUBISHI OIL CORP (3)· patent assignee history
2001–2004Based in Kanagawa, JP· patent location history
2014–2015Patents assigned to HOTATE KAZUO (2)· patent assignee history
2014–2015Patents assigned to KUMAGAI YOSHIHIRO (2)· patent assignee history
2015Based in Musashino, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
KURARAY CO61995–2006
NIPPON MITSUBISHI OIL CORP32001–2004
ANDO ELECTRIC22000
HOTATE KAZUO22014–2015
KUMAGAI YOSHIHIROself22014–2015
Locations
LocationPatentsSpan
Yokohama, JP51995–2015
Tokyo, JP42000–2021
Niigata, JP41995–2006
Kanagawa, JP22001–2004
Musashino, JP12015