USPC Class Details – HistoricIP

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 (517) electrical current collector

Hierarchy/Derived subclasses

429 / 400	-> 517	-> 518
		-> 519	-> 520
			-> 521
			-> 522

uspto searches

Patent Apps in 429/517

Granted Patents in 429/517

Use the links above or do an advanced search in ppubs for:
(429/517.ccls. or 429/518.ccls. or 429/519.ccls. or 429/520.ccls. or 429/521.ccls. or 429/522.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.