Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7436497 | Apparatus and method for providing spot lighting for gemstone observation | Mary Johnson, David S. H. Rosenthal | 2008-10-14 |
| 7088434 | Apparatus and method for providing spot lighting for gemstone observation | Mary Johnson, David S. H. Rosenthal | 2006-08-08 |