There are a number of patent search sites available today. A new one is a semantic patent search — searching by meaning or interpretation of terms — called Setrue Semantic Patent Search Engine by Transformer.

Currently, the engine contains patents and patent applications from the USPTO — EPO patents with weekly updates and more databases will be acquired in the near future. Setrue Semantic Patent Search system includes:
1.A natural language query capabilities.
2.Query auto-complete suggestions.
3. A detailed class directory structure enabling a one click segmentation of search results to a specific patent class.
4.A dynamic clustering of search results by classes
5. A dynamic clustering of search results by years
6.A dynamic clustering of search results by assignees. 7.Similar patents segmentation.
8.A dynamic weighting of search terms 9.Highlighting of search terms in documents and more.