Inventor
Tomoyoshi Yamashita
Inventor
Kanagawa, JP
Overview
Patents· 30 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus38%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein28%
B29DProducing particular articles from plastics or from substances in a plastic state10%
C08LCompositions of macromolecular compounds3%
D01FChemical features in the manufacture of artificial filaments, threads, fibres, bristles or ribbons3%
G01NInvestigating or analysing materials by determining their chemical or physical properties3%
B26FPerforating1%
B29CShaping or joining of plastics1%
C01BNon-metallic elements1%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds1%
PatentTitleYear
10,975,501Carbon material and production method for same202110,870,929Polypropylene fiber and method for manufacturing polypropylene fiber20209,507,077'Resin composition for light guide article-preform, light guide article-preform, laminated light guide article-preform, light guide article for surface light source device and surface light source device'20168,795,843'Acrylic film for punching, surface light-source device and process for manufacturing optical member'20147,815,357'Light guide for surface light source device and surface light source device'20107,736,045'Area light source and lightguide used therefore'20107,578,607'Light deflector and light source device'20097,534,024'Optical deflector element and light source device'20097,530,719'Light source device and light deflection element'20097,520,652'Area light source'20097,522,809'Planar light source and light guide for use therein'20097,401,962'Light deflection element and light source apparatus using the same'20087,380,969'Planar light source system and light deflecting device therefor'20087,380,968'Optical deflector element and light source device'20087,226,197'Surface light source device and light guide used therefor'20077,220,038'Light source device and light polarizing element'20077,201,510'Edge lighted device with polarization'20077,153,017'Light deflection element and light source apparatus using the same'20067,139,464'Surface light source and light guide used therefor'20067,128,456'Light source device'20067,008,099'Light source device'20067,004,610'Light source device'20066,986,599'Light source device'20066,874,902'Light source device'20056,669,350'Planar light source system and light deflecting device therefor'20036,631,233'Graded index type optical fibers and method of making the same'20036,529,665'Refractive index profile type optical fiber'20036,307,992'Graded index type optical fibers and method of making the same'20016,185,353'Graded index type optical fibers and method of making the same'20015,120,978'Method and apparatus for scattered light measurements'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–2016Patents assigned to MITSUBISHI RAYON CO (27)· patent assignee history
1992–2003Based in Otake, JP· patent location history
2003–2014Based in Kanagawa, JP· patent location history
2003–2016Based in Hiroshima, JP· patent location history
2009–2014Patents assigned to YAMASHITA TOMOYOSHI (2)· patent assignee history
2014Patents assigned to FUJIYAMA KOUSUKE (1)· patent assignee history
2014Patents assigned to KONOKAWA YUUHEI (1)· patent assignee history
2020–2021Patents assigned to MITSUBISHI CHEM CORP (2)· patent assignee history
2020Based in Chiyoda-ku, JP· patent location history
2021Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MITSUBISHI RAYON CO | 27 | 1992–2016 |
| MITSUBISHI CHEM CORP | 2 | 2020–2021 |
| YAMASHITA TOMOYOSHIself | 2 | 2009–2014 |
| FUJIYAMA KOUSUKE | 1 | 2014 |
| KONOKAWA YUUHEI | 1 | 2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kanagawa, JP | 21 | 2003–2014 |
| Otake, JP | 4 | 1992–2003 |
| Hiroshima, JP | 2 | 2003–2016 |
| Tokyo, JP | 1 | 2021 |
| Chiyoda-ku, JP | 1 | 2020 |