Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11884678 | Method for producing a spirooxindole derivative | Keiji Nakayama | 2024-01-30 |
| 10851111 | Method for producing a spirooxindole derivative | Keiji Nakayama | 2020-12-01 |
| 10030028 | Method for producing a spirooxindole derivative | Keiji Nakayama | 2018-07-24 |
| 7014377 | Key pad, resin key top injection mold, and resin key top manufacturing method | — | 2006-03-21 |
| 5820809 | Manufacturing method for key tops | Hiroshi Yajima, Masayuki Kashino, Akihiro Tsuji, Masaru Nakajo, Nobuaki Oji | 1998-10-13 |