Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5340788 | Diphenylsulfone derivatives and heat sensitive recording materials | Takafumi Tohyama, Takehiro Sato, Kousaku Morita, Nobuyuki Hirai | 1994-08-23 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5340788 | Diphenylsulfone derivatives and heat sensitive recording materials | Takafumi Tohyama, Takehiro Sato, Kousaku Morita, Nobuyuki Hirai | 1994-08-23 |