Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4341403 | Fluoran compounds, process for preparation thereof, and recording sheets using same | Kozo Sato, Ken Iwakura | 1982-07-27 |
| 4333984 | Heat-sensitive recording sheets | Hiroharu Matsukawa | 1982-06-08 |