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 (452) grouping of fuel cells into stack or module (454) with electrolyte or reactant supply or circulation (456) with fluid distribution means

Hierarchy/Derived subclasses

429 / 400	-> 452	-> 454	-> 456	-> 457
				-> 458	-> 459
					-> 460
					-> 461
				-> 462

uspto searches

Patent Apps in 429/456

Granted Patents in 429/456

Use the links above or do an advanced search in ppubs for:
(429/456.ccls. or 429/457.ccls. or 429/458.ccls. or 429/459.ccls. or 429/460.ccls. or 429/461.ccls. or 429/462.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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