The CLEF-IP track was launched in 2009 to investigate IR techniques for patent retrieval. It is part of the CLEF 2009 evaluation campaign. Also, in 2009 we built a system in order to participate in the CLEF-IP competition. Our system has three main components: filtering module, indexing module, and searching module. Because the process of indexing of all 75 G of input documents with patents took too much time we decided to work in a peerto-peer environment with four computers. In this paper we will see how we managed to built this system.