USPC Class Details – HistoricIP

Description: 128 surgery / 128 surgery/(846) body protecting or restraining devices for patients or infants (e.g., shields, immobilizers) (857) head or face protector (e.g., lips, ears, etc.) (864) aural protectors (e.g., ear)

Hierarchy/Derived subclasses

128 / 846	-> 857	-> 864	-> 865
			-> 866
			-> 867	-> 868

uspto searches

Patent Apps in 128/864

Granted Patents in 128/864

Use the links above or do an advanced search in ppubs for:
(128/864.ccls. or 128/865.ccls. or 128/866.ccls. or 128/867.ccls. or 128/868.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.