Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9296163 | Metallic toned dial plate and production method of the same | — | 2016-03-29 |
| 9102107 | Metallic toned dial plate and production method of the same | — | 2015-08-11 |
| 4777480 | Multi-scale indicator | Keiji Okamoto, Sakae Tsukamoto | 1988-10-11 |