USPC Class Details

Description: 503 record receiver having plural interactive leaves or a colorless color former, method of use, or developer therefor / 503 record receiver having plural interactive leaves or a colorless color former, method of use, or developer therefor/(200) having a colorless color-former, developer therefor, or method of use (210) heavy metal reactant

Hierarchy/Derived subclasses

503 / 200

-> 210

-> 211

-> 212

uspto searches

Patent Apps in 503/210

Granted Patents in 503/210

Use the links above or do an advanced search in ppubs for:
(503/210.ccls. or 503/211.ccls. or 503/212.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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