Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11015076 | Ink composition for reversibly thermochromic stamp and stamp | Akio Nakashima, Hiroshi Umemoto | 2021-05-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11015076 | Ink composition for reversibly thermochromic stamp and stamp | Akio Nakashima, Hiroshi Umemoto | 2021-05-25 |