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)

Introduced: September 1968

Title

Titles differ between systems:

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

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)

Full Title

Full titles differ between systems:

IPC:

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

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)

Of 4 combined children, 2 exist in both systems.

2 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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B28D 5/0005 +4 CPC CPC only CPC only
B28D 5/0058 +4 CPC CPC only CPC only
B28D 5/02 by rotary tools, e.g. drills +2 CPC IPC+CPC Available in IPC and CPC
B28D 5/04 by tools other than rotary type, e.g. reciprocating tools +3 CPC IPC+CPC Available in IPC and CPC