USPC Class Details

Description: 429 chemistry: electrical current producing apparatus, product, and process / 429 chemistry: electrical current producing apparatus, product, and process/(400) fuel cell, subcombination thereof, or method of making or operating (479) fuel cell with solid electrolyte (491) specified solid electrolyte (492) polymeric material (e.g., proton exchange membrane (pem), etc.) (493) having sulfonic acid groups

Hierarchy/Derived subclasses

429 / 400

-> 479

-> 491

-> 492

-> pem

-> 493

-> 494

uspto searches

Patent Apps in 429/493

Granted Patents in 429/493

Use the links above or do an advanced search in ppubs for:
(429/493.ccls. or 429/494.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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