Class Subclass Patent
PLT 156 PP028593
  161 PP028594
    PP028595
  184 PP028596
  197 PP028597
  203 PP028598
  227 PP028599
  228 PP028600
    PP028601
    PP028602
  277 PP028603
    PP028604
  278 PP028605
  288 PP028606
  289 PP028607
  311 PP028608
    PP028609
  318.3 PP028610
  318.4 PP028611
  356.11 PP028612
  373 PP028613
    PP028614
  417 PP028615
  428 PP028616
    PP028617
  471 PP028618
  475 PP028619
    PP028620
  479 PP028621