Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6414426 | High-efficiency light source | Masanori Shimizu, Shoetsu Sakamoto | 2002-07-02 |
| 5662403 | Luminaire for interior lighting | Yukio Akashi, Yoshinori Tanabe, Kenji Mukai | 1997-09-02 |
| 5450297 | Refrigerator lighting | Yukio Akashi | 1995-09-12 |