Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6664733 | Electrode for discharge tube, and discharge tube using it | Syoji Ishihara | 2003-12-16 |
| 6580218 | Discharge tube | Syoji Ishihara | 2003-06-17 |
| 6548959 | Discharge tube with substantially exposed cathode tip portion for use as a light source | Syoji Ishihara, Yuji Shimazu | 2003-04-15 |