Method and apparatus for placing identifying indicia on the surface of precious stones including diamonds
US4392476A · kind A · utility
52Cited by
6References
52Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1980 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | Dec 23, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2101/007
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A practice for applying indicia to the surface of a precious stone wherein a source of laser energy is directed at the stone surface and controlled to inscribe the surface with the desired indicia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.