Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11560490 | Water-based ink composition for ballpoint pen and water-based ballpoint pen using the same | — | 2023-01-24 |
| 10145814 | Internal solution for reference electrode, reference electrode, and glass electrode | Yuji Nishio, Akio Ishii | 2018-12-04 |
| 9976043 | Solid writing material | — | 2018-05-22 |
| 7607919 | Magnetic substance display panel | — | 2009-10-27 |