B28D - CPC Classification

• B28D1/00 » Working stone or stone-like materials, e.g. brick, concrete {or glass} , not provided for elsewhere; machines, devices, tools therefor 36
• B28D3/00 » Dressing mill discs or rollers 0
• B28D5/00 » Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor 148
• B28D7/00 » Accessories specially adapted for use with machines or devices of the preceding groups 53