Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6810217 | Process cartridge | Hirohide Tanikawa, Tsutomu Onuma, Nobuyuki Okubo | 2004-10-26 |
| 6673506 | Toner production process | Tsuneo Nakanishi, Hirohide Tanikawa, Tsutomu Onuma, Nobuyuki Okubo | 2004-01-06 |