USPC Class Details

Description: 351 optics: eye examining, vision testing and correcting / 351 optics: eye examining, vision testing and correcting/(200) eye examining or testing instrument (205) objective type (211) including projected target image

Hierarchy/Derived subclasses

351 / 200-> 205-> 211-> 212

uspto searches

Patent Apps in 351/211

Granted Patents in 351/211

Use the links above or do an advanced search in ppubs for:
(351/211.ccls. or 351/212.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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