发明名称 |
Method for cutting ornamental transparent gemstones and products produced therefrom |
摘要 |
This invention relates generally to a method for systematically and accurately increasing the brilliance and depth of color of a gemstone without the need to determine the pavilion and facet angles by trial and error.
|
申请公布号 |
US4083352(A) |
申请公布日期 |
1978.04.11 |
申请号 |
US19770763404 |
申请日期 |
1977.01.28 |
申请人 |
ANDRYCHUK, DMETRO |
发明人 |
ANDRYCHUK, DMETRO |
分类号 |
A44C17/00;B28D5/00;(IPC1-7):B28D5/00 |
主分类号 |
A44C17/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|