Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665675 | Aminobenzenesulfonamide derivative and recording medium using the same | Kaoru Hamada, Akio Sekine | 1997-09-09 |
| 5661100 | Urea (thiourea) derivative and thermal recording sheet using the same | Toshiaki Minami, Kaoru Hamada, Akio Sekine, Ryoichi Kinishi, Ryuzo Minakami | 1997-08-26 |
| 5612279 | Optical recording sheet | Toshimi Satake, Toshiyuki Takano, Hideki Hayasaka, Yukiko Uehori | 1997-03-18 |