Subclass Subgroup Patent
C02F 1/003 09809462
  1/04 09809463
  1/24 09809464
    09809465
  1/288 09809466
  1/325 09809467
    09809468
  1/4606 09809469
  1/461 09809470
  1/46104 09809471
  1/481 09809472
  1/78 09809473