Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7557917 | System and method for analysis of gemstones | — | 2009-07-07 |
| 7324188 | Characterization of color and clarity enhancement agents in gems | — | 2008-01-29 |
| 7105822 | Characterization of clarity and color enhancement agents in gems | — | 2006-09-12 |
| 4534644 | Guides for color grading faceted gemstones | — | 1985-08-13 |