Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7404399 | Diamond tool, synthetic single crystal diamond and method of synthesizing single crystal diamond, and diamond jewelry | Hitoshi Sumiya, Yutaka Kobayashi, Takeru Nakashima | 2008-07-29 |
| 5569921 | Infrared optical part and measuring instrument | Shuichi Sato, Hitoshi Sumiya, Jiro Katoh | 1996-10-29 |