Fujisawa, Japan

Naohiro Koizumi

This inventor holds 1 USPTO granted patent. Top assignees: Hitachi Systems & Services, Ltd., Hitachi, Ltd.. Active years: 2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Naohiro Koizumi. Retrieved from https://idiyas.com/inventor/naohiro-koizumi

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile


% Patents Active = 100.0

Average Co-Inventor Count = 3.0

ph-index = 1

Forward Citations = 9(Granted Patents)


Company Filing History:


Years Active: 2006

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1 patent (USPTO):Explore Patents

Title: Naohiro Koizumi: Innovator in Document Retrieval Technologies

Introduction: Naohiro Koizumi, an accomplished inventor from Fujisawa, Japan, has made significant contributions to the field of document retrieval. With a focus on expanding character strings for improved search results, his innovative approach has led to a patented method that increases the efficiency of information retrieval systems.

Latest Patents: Koizumi holds a notable patent titled "Method and System for Expanding Document Retrieval Information." This invention comprises an apparatus designed to enhance the document retrieval process by utilizing a character string dividing device. The device divides the entered character string into partial character strings, which are then referenced against a similarity table. This table contains similar partial character strings derived from modifications of the original strings, enabling the system to concatenate these similar strings into expanded words, ultimately enriching the search results.

Career Highlights: Throughout his career, Naohiro Koizumi has worked with prominent companies such as Hitachi, Ltd. and Hitachi Systems & Services, Ltd. His experiences at these organizations have undoubtedly influenced his innovative approach and contributed to his understanding of technology and information systems.

Collaborations: Naohiro has collaborated with several talented individuals during his tenure in the tech industry. Notable among his coworkers are Katsumi Tada and Hisashi Takatori, who have contributed to various projects in enhancing information retrieval methods.

Conclusion: Naohiro Koizumi’s work exemplifies the spirit of innovation in the realm of document retrieval technologies. His patented methods not only illustrate his expertise but also pave the way for future advancements in information searching and retrieval systems.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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