Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7560877 | Operation circuit for a discharge lamp and device for operation of a discharge lamp and a light source device | Masashi Okamoto | 2009-07-14 |
| 7002298 | Ultra-high pressure discharge lamp | — | 2006-02-21 |
| 6838823 | Discharge lamp | — | 2005-01-04 |
| 6713949 | Short arc type ultra-high pressure discharge lamp | Tetu Okamoto | 2004-03-30 |
| 6653786 | Super-high pressure mercury lamp | Tetu Okamoto | 2003-11-25 |
| 4962816 | Arrangement for controlling bulldozer blade | Kazutoshi Imon, Hiroshi Shimizu | 1990-10-16 |