Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8137019 | Ink composition for writing instrument and writing instrument | Mayumi Yamaguchi, Akinori Tanaka | 2012-03-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8137019 | Ink composition for writing instrument and writing instrument | Mayumi Yamaguchi, Akinori Tanaka | 2012-03-20 |