Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6042290 | Writing tool | Shinichi Ishikawa, Matsuhei Toyama | 2000-03-28 |
| 4583568 | Valve assembly for powdery granules | Takashi Yamakawa, Ikuhei Otani | 1986-04-22 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6042290 | Writing tool | Shinichi Ishikawa, Matsuhei Toyama | 2000-03-28 |
| 4583568 | Valve assembly for powdery granules | Takashi Yamakawa, Ikuhei Otani | 1986-04-22 |