Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6827767 | Ink for ball-point pen and ball-point pen | Masaru Miyamoto, Shigeru Miyazaki | 2004-12-07 |
| 6818047 | Ink for ball pen and ball pen | Masaru Miyamoto, Shigeru Miyazaki | 2004-11-16 |