Methods, apparatus, and systems for evaluating gemstones
US7420657B2 · kind B2 · utility
22Cited by
19References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2004 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Nov 19, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/8806
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods for grading gemstones, apparatus for grading gemstones, and systems that utilize such methods and apparatus are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.