Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D323844 | Offset printing machine | Tetsuyuki Doi | 1992-02-11 |
| D321000 | Offset printing machine | Tetsuyuki Doi | 1991-10-22 |
| 4967660 | Sheet-fed rotary printing press for both obverse and reverse side printing | Hiroshi Yamanari, Nobuhiko Fujisawa | 1990-11-06 |