Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6818280 | Rectangular brilliant-cut diamond | Tamotsu Matsumura, Akira Itoh | 2004-11-16 |
| 6694778 | Cut design of diamond for ornamental use | Tamotsu Matsumura | 2004-02-24 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6818280 | Rectangular brilliant-cut diamond | Tamotsu Matsumura, Akira Itoh | 2004-11-16 |
| 6694778 | Cut design of diamond for ornamental use | Tamotsu Matsumura | 2004-02-24 |