Inventor
Tadayoshi Fukuda
Inventor
Tokyo, JP
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Bprimary
G02BOptical elements, systems or apparatus44%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein22%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form11%
F21KNon-electric light sources using luminescence11%
F21VFunctional features or details of lighting devices or systems thereof11%
PatentTitleYear
10,754,083Optical sheet for backlight unit and backlight unit202010,466,405Prism sheet for backlight unit and backlight unit for liquid crystal display device201910,459,151Optical sheet for liquid crystal display device, and backlight unit for liquid crystal display device201910,386,567Optical sheet for liquid crystal display device, backlight unit for liquid crystal display device and production method of optical sheet for liquid crystal display device2019Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2019–2020Patents assigned to KEIWA INC (4)· patent assignee history
2019–2020Based in Tokyo, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| KEIWA INC | 4 | 2019–2020 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 4 | 2019–2020 |