Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6614147 | Cathode ray tube having an improved indirectly heated cathode structure | Sachio Koizumi, Norio Iwamura | 2003-09-02 |
| 6552479 | Cathode ray tube having an improved heater | Norio Iwamura, Sachio Koizumi | 2003-04-22 |
| 6531813 | Cathode ray tube having an improved cathode structure | Sachio Koizumi | 2003-03-11 |
| 6504293 | Cathode ray tube having an improved cathode | Sachio Koizumi, Norio Iwamura | 2003-01-07 |