USPC Class Details

Description: 434 education and demonstration / 434 education and demonstration/(156) language (167) spelling, phonics, word recognition, or sentence formation (172) letter-bearing elements (e.g., cards, blocks, etc.) selectively aligned to form word or sentence (175) letter-bearing elements slidable between different grooves

Hierarchy/Derived subclasses

434 / 156-> 167-> 172-> 175

uspto searches

Patent Apps in 434/175

Granted Patents in 434/175

Use the links above or do an advanced search in ppubs for:
(434/175.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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