Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6494566 | Head member having ultrafine grooves and a method of manufacture thereof | Toshikazu Kishino, Keisuke Ito, Makoto Ohkubo | 2002-12-17 |
| 4656145 | Zirconia type black decorative article and process for production thereof | — | 1987-04-07 |
| 4639426 | Decorative hard golden ceramic article | Yoshio Nagato | 1987-01-27 |
| 4511665 | Decorative hard golden ceramic article | Yoshio Nagato | 1985-04-16 |