Issued Patents 2002
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6491747 | Water based ink composition for writing instrument | Masaru Miyamoto | 2002-12-10 |
| 6492435 | Water based white color tone pigment ink for ball point pen | Masaru Miyamoto, Miki Shinozuka | 2002-12-10 |
| 6471759 | Water based ink composition for writing instrument | Masaru Miyamoto | 2002-10-29 |
| 6451099 | Water based ink composition for ball point pen | Masaru Miyamoto, Miki Shinozuka | 2002-09-17 |
| 6391927 | Method for manufacturing ink follower for water base ballpoint pens | Norio Ogura, Youji Takeuchi, Kiyoshi Iwamoto, Katsuhiko Shiraishi | 2002-05-21 |
| 6376560 | Ink follower for water-base ballpoint pens and method of manufacturing the same | Norio Ogura, Youji Takeuchi, Kiyoshi Iwamoto, Katsuhiko Shiraishi | 2002-04-23 |