USPC Class Details

Description: 455 telecommunications / 455 telecommunications/(39) transmitter and receiver at separate stations (68) with control signal (70) receiver control signal originates at message transmitter (72) for compression and expansion of message signal (i.e., companding)

Hierarchy/Derived subclasses

455 / 39-> 68-> 70-> 72

uspto searches

Patent Apps in 455/72

Granted Patents in 455/72

Use the links above or do an advanced search in ppubs for:
(455/72.ccls.)

This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find patents or patent applications in those subclasses.
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