Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7075221 | Projection tube having different neck diameters | Kouichi Saitou, Kazumasa Hirai, Tetsuo Asano, Yasuo Tanaka | 2006-07-11 |
| 6998767 | Projection tube having different neck diameters | Kouichi Saitou, Kazumasa Hirai, Tetsuo Asano, Yasuo Tanaka | 2006-02-14 |
| 6847159 | Projection tube having different neck diameters | Nobuyuki Suzuki, Kouichi Saitou, Shoji Shirai | 2005-01-25 |
| 6750602 | Projection type cathode ray tube device employing a cathode ray tube having a neck composed of different-diameter portions | Katsumi Hirota, Kazumasa Hirai, Takashi Hoshimure | 2004-06-15 |