Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7433075 | Method and image forming apparatus, and printing system for recording invisible information recording | Kazuyoshi Tokunaga, Seiji Kageyama | 2008-10-07 |
| 7209256 | Document processing method | Seiji Kageyama, Katsumi Kumagai, Tatsuro Akabane, Kazuyoshi Tokunaga, Tomoko Kitaura +1 more | 2007-04-24 |
| 6567180 | Document printing method | Seiji Kageyama, Katsumi Kumagai, Tatsuro Akabane, Kazuyoshi Tokunaga, Tomoko Kitaura +1 more | 2003-05-20 |
| 5841548 | Printing apparatus for reproducing copy sets containing variable pages and a sorting means for separating the different copy sets | Kazuyoshi Tokunaga | 1998-11-24 |