IPC Subgroup
B28D 5/02 by rotary tools, e.g. drills
Introduced: September 1968
Last revised: January 2006
Full Title
Fine working of gems, jewels, crystals, e.g. of semiconductor material; Apparatus therefor > by rotary tools, e.g. drills
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- WORKING CEMENT, CLAY, OR STONE
- Subclass:
- WORKING STONE OR STONE-LIKE MATERIALS