Method of modification of the color of gems

Details Method of modification of the color of gems Method of modification of the color of gems

Category

B - Operations, Transporting

Subcategory

01

Subsubcategory

J

CPC

358/22, 149/5

IPC codes

B01J 19/08 (2006.01) G21H 5/00 (2006.01)

Type

Patent

Patent number

CA 911079

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Also associated with

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