USPC Class Details

Description: 398 optical communications / 398 optical communications/(43) multiplex (79) wavelength division or frequency division (e.g., raman, brillouin, etc.) (82) by optical coupling (83) add or drop (84) grating

Hierarchy/Derived subclasses

398 / 43-> 79-> 82-> 83-> 84

uspto searches

Patent Apps in 398/84

Granted Patents in 398/84

Use the links above or do an advanced search in ppubs for:
(398/84.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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