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 (428) process or means for control of operation (443) arrangement or process for reactant control (e.g., pressure or concentration, etc.)

Hierarchy/Derived subclasses

429 / 400	-> 428	-> 443	-> 444	-> 445
				-> 446
			-> 447	-> 448	-> 449

uspto searches

Patent Apps in 429/443

Granted Patents in 429/443

Use the links above or do an advanced search in ppubs for:
(429/443.ccls. or 429/444.ccls. or 429/445.ccls. or 429/446.ccls. or 429/447.ccls. or 429/448.ccls. or 429/449.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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