Patent Retrieval Method Based on Similarity Calculation of a Single Patent

For reverse engineering or infringement avoiding design, designers have to access relevant patents efficiently and accurately based on a specific patent (referred to “the target patent” below) in hand. A retrieval method based on a single patent is proposed. A batch of patents (referred to “the preliminary patents” below) is obtained by the keywords retrieval and retrieved again using the target patent. Then the most similar patents to the target patent are acquired by similarity calculation and sorted by the values. The effect of keyword form and its location on the similarity calculation is considered. The efficiency and accuracy of the improved algorithm are verified by tests.