DIFF Subgroup
B28D 5/02 by rotary tools, e.g. drills
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Fine working of gems, jewels, crystals, e.g. of semiconductor material; Apparatus therefor > by rotary tools, e.g. drills
CPC:
Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor (working by grinding or polishing B24; for artistic purposes B44B) > by rotary tools, e.g. drills
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
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