A
SECTION A — HUMAN NECESSITIES
  
AGRICULTURE
 A21
BAKING; EDIBLE DOUGHS
 A21B
BAKERS' OVENS; MACHINES OR EQUIPMENT FOR BAKING (combustion apparatus F23; domestic stoves or ranges being wholly or partly ovens F24B, F24C)

 A21C
MACHINES AND EQUIPMENT FOR MAKING AND PROCESSING DOUGHS; HANDLING BAKED ARTICLES MADE FROM DOUGH

 A21D
TREATMENT, E. G. PRESERVATION, OF FLOUR OR DOUGH, E. G. BY ADDITION OF MATERIALS; BAKING; BAKERY PRODUCTS; PRESERVATION THEREOF