Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8537305 | Liquid crystal display with narrow angular range of incident light | Ken Sumiyoshi | 2013-09-17 |
| 8427601 | Liquid crystal display with narrow angular range of incident light | Ken Sumiyoshi | 2013-04-23 |
| 8319914 | Liquid crystal display with narrow angular range of incident light | Ken Sumiyoshi | 2012-11-27 |
| 8237885 | Liquid crystal display with narrow angular range of incident light and method of making the display | Ken Sumiyoshi | 2012-08-07 |
| 7982820 | Liquid crystal display with narrow angular range of incident light and method of making the display | Ken Sumiyoshi | 2011-07-19 |
| 7551244 | Optical element, light source unit, and display device | Ken Sumiyoshi, Fujio Okumura, Shigetoshi Hayata, Tamio Uchino, Yoshiaki Furuya +3 more | 2009-06-23 |
| 6391081 | Metal purification method and metal refinement method | Masahito Uchikoshi, Norio Yokoyama, Minoru Isshiki | 2002-05-21 |