Subclass Subgroup Patent
C02F 1/006 12168613
  1/283 12168614
    12168615
  1/285 12168616
  1/325 12168617
  1/42 12168618
    12168619
  1/46104 12168620
  1/46176 12168621
  1/705 12168622
  3/341 12168623
  5/105 12168624