|  | B |
SECTION B — PERFORMING OPERATIONS

SHAPING

|  | B28 |
WORKING CEMENT, CLAY, AND STONE

|  | B28D |
WORKING STONE OR STONE-LIKE MATERIALS

|  | B28D 1/00 |
Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhere; Machines, devices, tools therefor (fine working of gems, jewels, crystals Fulltext... Hierarchy... Expanded...B28D 5/00; working by grinding or polishing Fulltext... Hierarchy... Expanded...B24; truing of grindstones Fulltext... Hierarchy... Expanded...B24B 53/00)

|  | B28D 1/02 |
· | by sawing

|  | B28D 1/04 |
· · | with circular saw blades or saw discs (Fulltext... Hierarchy... Expanded...B28D 1/10 takes precedence)

|  | B28D 1/06 |
· · | with reciprocating saw blades (Fulltext... Hierarchy... Expanded...B28D 1/10 takes precedence)

|  | B28D 1/08 |
· · | with saw blades of endless cutter-type, e.g. chain saws, strap saws (Fulltext... Hierarchy... Expanded...B28D 1/10 takes precedence)

|  | B28D 1/10 |
· · | with provision for measuring

|  | B28D 1/12 |
· · | Saw blades specially adapted for working stone

|  | B28D 1/14 |
· | by boring or drilling (portable percussive tools Fulltext... Hierarchy... Expanded...B25D; rotary drilling machines, mining and quarrying Fulltext... Hierarchy... Expanded...E21C)

|  | B28D 1/16 |
· | by turning

|  | B28D 1/18 |
· | by milling, e.g. channelling by means of milling tools

|  | B28D 1/20 |
· | by planing, e.g. channelling by means of planing tools

|  | B28D 1/22 |
· | by cutting, e.g. incising

|  | B28D 1/24 |
· · | with cutting discs

|  | B28D 1/26 |
· | by impact tools, e.g. by chisels or other tools having a cutting edge (portable percussive tools Fulltext... Hierarchy... Expanded...B25D)

|  | B28D 1/28 |
· · | without cutting edge

|  | B28D 1/30 |
· | to form contours, i.e. curved surfaces, irrespective of the method of working used (for artistic purposes Fulltext... Hierarchy... Expanded...B44B)

|  | B28D 1/32 |
· | Methods and apparatus specially adapted for working materials which can easily be split, e.g. mica, slate, schist

|  | B28D 3/00 |
Dressing mill discs or rollers (dressing the tools of sawing machines or sawing devices Fulltext... Hierarchy... Expanded...B23D 63/00; treating the cutting members of cutting machines to facilitate cutting Fulltext... Hierarchy... Expanded...B26D 7/08)

|  | B28D 3/02 |
· | Machines

|  | B28D 3/04 |
· · | for grooving rollers

|  | B28D 5/00 |
Fine working of gems, jewels, crystals, e.g. of semi-conductor material; Apparatus or devices therefor (working by grinding or polishing Fulltext... Hierarchy... Expanded...B24; for artistic purposes Fulltext... Hierarchy... Expanded...B44B)

|  | B28D 5/02 |
· | by rotary tools, e.g. drills

|  | B28D 5/04 |
· | by tools other than of rotary type, e.g. reciprocating tools

|  | B28D 5/06 |
· | by non-mechanical methods, e.g. chemical methods

|  | B28D 7/00 |
Accessories specially adapted for use with machines or devices of the preceding groups

|  | B28D 7/02 |
· | for removing or laying dust, e.g. by spraying liquids; for cooling work

|  | B28D 7/04 |
· | for supporting or holding work