Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11623466 | Display medium provided with diffraction structure and light control element | — | 2023-04-11 |
| 10792949 | Information recording medium, label, card and method of authentication | Naoki Minamikawa | 2020-10-06 |
| 10737525 | Watermarked paper | — | 2020-08-11 |
| 9827804 | Diffraction structure transfer foil and forgery prevention medium using same | — | 2017-11-28 |
| 8054550 | Optical device, laminate and labeled article | Kazuhiro Yashiki, Naoaki Shindou, Noriyuki ITOU, Naoki Minamikawa | 2011-11-08 |