Subclass Subgroup Patent
H03M 1/46 12170523
  1/468 12170524
  1/66 12170525
    12170526
  1/785 12170527
  7/3059 12170534
  13/1111 12170528
  13/1131 12170529
  13/13 12170530
  13/154 12170531
  13/2792 12170532
  13/2909 12170533