Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8049422 | Electric discharge lamp having ceramic luminous tube | Toshiaki Tsuda | 2011-11-01 |
| 7977886 | Mercury-free discharge bulb | Toshiaki Tsuda, Takeshi Fukuyo, Shinichi Irisawa | 2011-07-12 |