Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6614147 | Cathode ray tube having an improved indirectly heated cathode structure | Sachio Koizumi, Toshifumi Komiya | 2003-09-02 |
| 6552479 | Cathode ray tube having an improved heater | Toshifumi Komiya, Sachio Koizumi | 2003-04-22 |
| 6504293 | Cathode ray tube having an improved cathode | Sachio Koizumi, Toshifumi Komiya | 2003-01-07 |
| 6492768 | Cathode ray tube having an improved indirectly heated cathode | Sachio Koizumi, Terutoshi Ichihara | 2002-12-10 |
| 6335590 | Cathode ray tube having an indirectly heated cathode provided with a heater having a structure which substantially prevents cracks in an insulating coating thereof | Sachio Koizumi | 2002-01-01 |
| 6191528 | Cathode ray tube having an improved indirectly heated cathode | Sachio Koizumi | 2001-02-20 |