Fine working of gems, jewels, crystals, e.g. of semiconductor material; Apparatus therefor

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: PERFORMING OPERATIONS; TRANSPORTING
Class:: WORKING CEMENT, CLAY, OR STONE
Subclass:: WORKING STONE OR STONE-LIKE MATERIALS

Related Keywords

BORING gems, jewels, crystals or semiconductor materialBORING glasscutting or working CRYSTALSDRILLING gems, jewels, crystals or semiconductor materialDRILLING glassdrilling or boring GLASScutting or working SEMICONDUCTOR(S) material

2 direct subcodes

Child Classifications

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B28D 5/02 by rotary tools, e.g. drills
B28D 5/04 by tools other than of rotary type, e.g. reciprocating tools