This Class 520 is considered to be an integral part of Class 260 (see the Class 260 schedule for the position of this Class in schedule hierarchy). This Class retains all pertinent definitions and class lines of Class 260.
Class 521 is an integral part of this Class 520, as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
Class 522 is an integral part of this Class 520, as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
Class 523 is an integral part of this Class 520, as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
Class 524 is an integral part of this Class 520, as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
Class 525 is an integral part of this Class 520, as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
Class 526 is an integral part of this Class 520, as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
Class 527 is an integral part of this Class 520, as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
Class 528 is an integral part of this Class 520, as shown by the position of this box, and follows the schedule hierarchy of this Class, retaining all pertinent definitions and Class lines of this class.
![[List of Pre Grant Publications for class 520 subclass 1]](../as.gif)
![[List of Patents for class 520 subclass 1]](../ps.gif)