Yasuhiro Koike
31Patents
11Active
31Granted
42Portfolio score
Filing activity: Apr 15, 1992 → Sep 17, 2020 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6222689A | Surface light source device and asymmetrical prism sheet | Physics | 162 | Expired |
| US5899552A | Surface light source device | Emerging Cross-Sectional Technologies | 74 | Expired |
| US7626655B2 | Surface light source device of side light type, liquid crystal display and guide plate | Physics | 62 | Expired |
| US5810464A | Surface light source device of side light type | Physics | 51 | Expired |
| US5887964A | Surface light source device and liquid crystal display | Physics | 38 | Expired |
| US5760139A | Graded-refractive-index optical plastic material and method for its production | Physics | 34 | Expired |
| US6104854A | Light regulator and surface light source device | Physics | 30 | Expired |
| US6217184A | Light source device with uniformity in color temperature of emission | Physics | 29 | Expired |
| US6290364A | Surface light source device | Emerging Cross-Sectional Technologies | 26 | Expired |
| US6384881B1 | Surface light source device of side light type and liquid crystal display | Physics | 22 | Expired |
| US8616746B2 | Optical element and light-emitting device | Physics | 19 | Active |
| US5253323A | Method of manufacturing a graded optical transmission medium made of synthetic resin | Physics | 13 | Expired |
| US6593415B2 | Graded-refractive-index optical plastic material and method for its production | Physics | 10 | Expired |
| US6152570A | Surface light source device | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5382448A | Method of manufacturing optical transmission medium from synthetic resin | Physics | 8 | Expired |
| US6590036B2 | Graded-refractive-index optical plastic material and method for its production | Physics | 6 | Expired |
| US6229654A | Article with radial refractive index gradient and process for its manufacture | Physics | 6 | Expired |
| US10890704B2 | Display device and method for selecting optical film of display device | Physics | 2 | Active |
| US6211929A | Surface light source device of side light type and liquid crystal display | Physics | 2 | Expired |
| US7058271B2 | Plastic optical fiber | Physics | 2 | Expired |
| US8981402B2 | White LED lighting device, and optical lens | Electricity | 1 | Active |
| US6641274B2 | Surface light source device | Physics | 1 | Expired |
| US10677975B2 | Display device, and method for selecting optical film for display device | Electricity | 1 | Active |
| US10668690B2 | Optical layered body and display device | Emerging Cross-Sectional Technologies | 1 | Active |
| US6500910B1 | Refractive index distribution type light transmitting device | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.