WORKING STONE OR STONE-LIKE MATERIALS

Description

B28D covers machines and methods for processing natural stone and stone-like materials, including cutting, grinding, polishing, shaping, and finishing operations. This subclass encompasses equipment such as stone saws, grinding mills, chisels, and automated machinery designed specifically for quarrying, dressing, and fabricating stone products into finished components or architectural elements. The classification includes both hand tools and industrial apparatus, as well as techniques for working materials such as granite, marble, limestone, slate, and synthetic stone composites, but excludes cement and clay processing, which are addressed in related subclasses.