Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6528444 | Glass composition, stem and bulb for lamps | Toshifumi Kondoh, Katsuaki Iwama | 2003-03-04 |
| 6229257 | Fluorescent lamp sealed with glass bead | Toshifumi Kondoh, Hisatoshi Uchiyama | 2001-05-08 |