Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6245258 | Smectic liquid crystal material and liquid crystal optical element | Ken-Ichi Takatori, Ken Sumiyoshi, Jin Matsushima | 2001-06-12 |
| 5777700 | Liquid crystal display with improved viewing angle dependence | Setsuo Kaneko, Ken Sumiyoshi | 1998-07-07 |
| 5726721 | Liquid crystal display apparatus | Ken Sumiyoshi | 1998-03-10 |
| 5434671 | Birefringent member cell gap measurement method and instrument | Ken Sumiyoshi | 1995-07-18 |