Description
Class B28D : WORKING STONE OR STONE-LIKE MATERIALS
Subclass 1/06: Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhere; Machines, devices, tools therefor (fine working of gems, jewels, crystals B28D 5/00; working by grinding or polishing B24; devices or means for dressing or conditioning abrasive surfaces B24B 53/00) by sawing with reciprocating saw blades (B28D 1/1 takes precedence)