Apparatus to assist in the qualitative evaluation of faceted gems
US5430538A · kind A · utility
29Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1993 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Dec 10, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/87
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for assisting in the qualitative evaluation of facted gems (i.e., gems having cut facets formed thereon), which magnifies the radiance of cut facets illuminated by colored light beams so as to allow direct viewing or the formation of a color image which can be expressed on a video screen and/or a video printer. The beauty of a gem at the time of its appraisal and sales is thereby increased by use of the apparatus which thereby contributes to gem appraisal and sales by arousing customer interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.