B21

MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL

Note(s) This class covers:[2015 01] working of metallic materials;working of non-metallic materials, provided that the methods applied are similar to those used in metal-working and not provided for elsewhere  This class does not cover : combinations of operations covered by different subclasses of class B21, which are covered by subclass B23P;combinations of operations covered by any particular subclass of class B21 with operations covered by other classes, e g  with operations involving removal of material, which are also covered by subclass B23P, except that if the operations covered by the other classes are subsidiary to the operations properly covered by a single subclass of B21 the combination is classified in that subclass