Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6713975 | Lighting apparatus, lighting control system and home electric appliance | Tatsumi Yamauchi, Fumio Murabayashi, Haruki Komatsu | 2004-03-30 |
| 5478401 | Apparatus and method for surface treatment | Sukeyoshi Tsunekawa, Keisuke Funatsu, Kenichi Kawasumi, Masaro Kaku | 1995-12-26 |
| 5246526 | Surface treatment apparatus | Sumio Yamaguchi, Kenichi Kawasumi | 1993-09-21 |
| 4842828 | Apparatus for treating surface of object with ultraviolet rays and reaction gas | Ken-ichi Kawasumi | 1989-06-27 |
| 4344018 | High pressure metal vapor discharge lamp | — | 1982-08-10 |