Overview of Patent Retrieval Task at NTCIR-4
Atsushi Fujii, Makoto Iwayama, Noriko Kando · 2004
In the Fifth NTCIR Workshop, we organized the Patent Retrieval Task and performed three subtasks; Document Retrieval, Passage Retrieval, and Classification. This paper describes the Document Retrieval Subtask and Passage Retrieval Subtask, both of which were intended for patent-to-patent invalidity search task. We show the evaluation results of the groups participating in those subtasks.