Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7091656 | Light emitting device | Takashi Ichihara | 2006-08-15 |
| 6617781 | Red light emitting long afterglow photoluminescence phosphor and afterglow lamp thereof | Kiyotaka Arai | 2003-09-09 |
| 5859496 | Lamp containing long decay phosphor | Keiji Ichinomiya | 1999-01-12 |
| 5376303 | Long Decay phoaphors | Martin R. Royce, Hiroto Tamaki | 1994-12-27 |