Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5121140 | Writing pressure-changing device for recording device or the like | Eiji Suzuki | 1992-06-09 |
| 4628326 | Apparatus for preventing drying-up of drawing needle pens | Takeji Hashimoto, Hirofumi Tano | 1986-12-09 |
| 4621428 | Pen tip cleaning assembly of plotter | Etsuji Tagami, Takeji Hashimoto, Hirofumi Tano | 1986-11-11 |