Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9678017 | System for evaluating a gemstone | Christian Marie Joseph Ghislain Corneille Lenaerts | 2017-06-13 |
| 8834177 | Computer-implemented method of and system for teaching an untrained observer to evaluate a gemstone | Christian Marie Joseph Ghislain Corneille Lenaerts | 2014-09-16 |
| 8317521 | Computer-implemented method of and system for teaching an untrained observer to evaluate a gemstone | Christian Maria Joseph Ghistian Corneille Lenaerts | 2012-11-27 |
| 6786733 | Computer-implemented method of and system for teaching an untrained observer to evaluate a gemstone | Christian Marie Joseph Ghislain Corneille Lenaerts | 2004-09-07 |