Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6980283 | Method and associated apparatus for the standardized grading of gemstones | — | 2005-12-27 |
| 6239867 | Apparatus and method for grading, testing, and identifying gemstones | — | 2001-05-29 |
| 6020954 | Method and associated apparatus for the standardized grading of gemstones | — | 2000-02-01 |