Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6348529 | Guanidine compound and heat sensitive recording material | Naoto Yanagihara, Mitsuyuki Tsurumi | 2002-02-19 |
| 6346359 | Pyrrolopyrimidineone compound and heat-sensitive recording material using the same | Mitsuyuki Tsurumi, Kazunori Nigorikawa | 2002-02-12 |