How can I suggest changes to the USPC Index?

The USPTO encourages suggestions and changes to improve the USPC Index. According to MPEP 902.01(a):

“Suggestions or changes to the Index are encouraged and should be directed to the Technology Center (TC) classification contact in the TCs.”

If you have suggestions for improving the Index, you should contact the classification specialists in the relevant Technology Center. This collaborative approach helps ensure that the Index remains a useful and up-to-date resource for patent classification.

To learn more:

• USPC
• Patent Classification
• Index Improvements
• USPTO Collaboration