Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665675 | Aminobenzenesulfonamide derivative and recording medium using the same | Tomoaki Nagai, Kaoru Hamada | 1997-09-09 |
| 5661100 | Urea (thiourea) derivative and thermal recording sheet using the same | Toshiaki Minami, Tomoaki Nagai, Kaoru Hamada, Ryoichi Kinishi, Ryuzo Minakami | 1997-08-26 |