Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10775313 | Method and apparatus for rapidly cooling a gem | Matt Hall, Wuyi Wang | 2020-09-15 |
| 9983143 | Method and apparatus for rapidly cooling a gem | Matt Hall, Wuyi Wang | 2018-05-29 |
| 6650489 | Gem identification viewer | Gilbert Norman Ravich, James Shigley | 2003-11-18 |
| 6292315 | Gem identification viewer | Gilbert Norman Ravich, James Shigley | 2001-09-18 |