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For the Inventor, By the Inventor

Kawasaki, Japan

Keiji Mizuma

This inventor holds 7 USPTO granted patents and 1 published patent application. Top assignee: Fujitsu Corporation. Active years: 1999-2013.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Mizuma. Retrieved from https://idiyas.com/inventor/keiji-mizuma

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

USPTO Granted Patents = 7 

% Patents Active = 42.9

Average Co-Inventor Count = 2.8

ph-index = 4

Forward Citations = 183(Granted Patents)


Company Filing History:

goldMedal7 out of 39,371 
 
Fujitsu Corporation
 patents

Years Active: 1999-2013

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7 patents (USPTO):Explore Patents
1. 8428587 - Mobile communication system, position registration method, terminal, and home agent (2013-04-23),
2. 7290000 - Server, user terminal, information providing service system, and information providing service method (2007-10-30),
3. 7175177 - Golf data management system, data center, and method of managing golf data (2007-02-13),
4. 7003557 - Method and system for racing control of operations in system management (2006-02-21),
5. 6978295 - Server apparatus for space information service, space information service providing method, and charge processing apparatus and charging method for space information service (2005-12-20),
6. 5956719 - Synchronization method applied to databases in network management system (1999-09-21),
7. 5910952 - Call restriction system for an ATM exchange (1999-06-08),

Title: Keiji Mizuma: Innovator in Mobile Communication Systems

Introduction

Keiji Mizuma is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of mobile communication systems, holding a total of 7 patents. His work focuses on enhancing communication technologies and positional information services.

Latest Patents

Mizuma's latest patents include a mobile communication system that features a home address holding function unit. This system stores one home address as a representative home address and others as subordinate home addresses. It also includes a position registration request function unit that creates address sets and sends position registration requests. Another notable patent involves a server and user terminal designed for a positional information service. This service center utilizes a database to retain bubble data, allowing users to acquire information about buildings and stores within a specified range.

Career Highlights

Keiji Mizuma has had a successful career at Fujitsu Corporation, where he has been instrumental in developing innovative communication technologies. His expertise in mobile communication systems has positioned him as a key figure in the industry.

Collaborations

Mizuma has collaborated with notable coworkers, including Yoshinobu Meifu and Akinori Kamijo. Their combined efforts have contributed to the advancement of mobile communication technologies.

Conclusion

Keiji Mizuma's contributions to mobile communication systems and positional information services highlight his innovative spirit and dedication to technology. His patents reflect a commitment to improving communication and information accessibility in our increasingly connected world.

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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