This inventor holds 5 USPTO granted patents. Top assignee: Hitachi, Ltd.. Active years: 1999-2006.
Company Filing History:
Years Active: 1999-2006
Title: Innovations of Yasushi Kawashimo
Introduction
Yasushi Kawashimo is a notable inventor based in Hirakata, Japan. He has made significant contributions to the field of document retrieval systems, holding a total of five patents. His work focuses on enhancing the efficiency and accuracy of information retrieval processes.
Latest Patents
Kawashimo's latest patents include a document retrieval method and a document retrieval system. In his first patent, word boundary identification operations, such as morpheme analysis, are performed on documents to be registered. This process identifies the top and end positions of words, allowing for the extraction of word boundary information. Search indexes are created for sub-strings of a predetermined length, known as n-grams, which are extracted from the document being registered. The search index includes document identification information and occurrence position information, indicating the string's location within the text data.
His second patent involves a registration and search method for structured documents. This method prepares correspondence data between fixed-length strings and their occurrence positions within a structured document. It also involves creating a list of characters and hierarchical elements, along with their lengths. The method extracts occurrence frequency and position of search terms using fixed-length substrings and an occurrence frequency extracting index. A search character is selected, and the corresponding hierarchical element is obtained, allowing for a calculated matching degree for the search term.
Career Highlights
Kawashimo is currently employed at Hitachi, Ltd., where he continues to innovate in the field of document retrieval technologies. His work has significantly impacted how structured documents are processed and searched, enhancing the overall efficiency of information retrieval systems.
Collaborations
Some of his notable coworkers include Tadataka Matsubayashi and Katsumi Tada. Their collaborative efforts contribute to the advancement of technology within their field.
Conclusion
Yasushi Kawashimo's contributions to document retrieval methods and systems demonstrate his expertise and innovative spirit. His patents reflect a commitment to improving information retrieval processes, making significant strides in the field.