Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6771024 | Fluorescent lamp | Masatoshi Sudou, Toshiyoshi Oga, Masaru Saitoh | 2004-08-03 |
| 6528444 | Glass composition, stem and bulb for lamps | Yutaka Koyamada, Katsuaki Iwama | 2003-03-04 |
| 6229257 | Fluorescent lamp sealed with glass bead | Yutaka Koyamada, Hisatoshi Uchiyama | 2001-05-08 |