Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11667146 | Writing tool | Hisatoshi Hayakawa, Tatsuya Iijima | 2023-06-06 |
| 7942598 | Writing implement | — | 2011-05-17 |
| 5190861 | Method for the diagnosis of rheumatoid arthritis | Taro HAYAKAWA, Shuji Kodama, Kazushi Iwata, Junichi Kishi, Kyoko Yamashita | 1993-03-02 |
| 5077132 | Biocompatible composite material and a method for producing the same | Shigeo Maruno, Seiji Ban, Haruo Ito | 1991-12-31 |