Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6391927 | Method for manufacturing ink follower for water base ballpoint pens | Youji Takeuchi, Kiyoshi Iwamoto, Tadashi Kamagata, Katsuhiko Shiraishi | 2002-05-21 |
| 6376560 | Ink follower for water-base ballpoint pens and method of manufacturing the same | Youji Takeuchi, Kiyoshi Iwamoto, Tadashi Kamagata, Katsuhiko Shiraishi | 2002-04-23 |