Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6474889 | Telescopic ball-point pen | — | 2002-11-05 |
| 6454688 | Charging roll whose outermost layer contains grafted carbon | Hirofumi Okuda, Yuichiro Maruyama, Hiroki Sugiura | 2002-09-24 |