How can I find a specific classification code?

When trying to build a search query, you may want to use a specific classification code to either refine your results or specifically find patents that have this particular classification code. There are a couple of ways to do this:

• Use the refinement filters: Once you have reached the search results page after completing your search, you can use the filters on the left-hand side of the screen to refine your results using specific classification codes, as seen in the image below.
  
  

• Use the classification code helpers: From the advanced search page, you can select the classification code helpers at the right hand end of the relevant classification text boxes. If you type a keyword into them, you will be given a number of suggestions of classification codes related to your search, these can then be added to refine your search.
  
  

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