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For the Inventor, By the Inventor

Tokyo, Japan

Kiyokazu Otsuka

This inventor holds 6 USPTO granted patents, plus 2 CIPO patents. Top assignee: Nec Corporation. Active years: 1996-2005.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kiyokazu Otsuka. Retrieved from https://idiyas.com/inventor/kiyokazu-otsuka

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

USPTO Granted Patents = 6

% Patents Active = 100.0

 

Average Co-Inventor Count = 1.5

ph-index = 5

Forward Citations = 138(Granted Patents)


Company Filing History:

goldMedal6 out of 36,684 
 
Nec Corporation
 patents

Years Active: 1996-2005

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6 patents (USPTO):Explore Patents
1. 6931000 - Internal line control system (2005-08-16),
2. 6571108 - Private branch mobile communication system and method (2003-05-27),
3. 6370393 - Private branch exchange (2002-04-09),
4. 6330448 - Handover arrangement for mobile station moving across the boundary of wireless cell-site stations of adjacent PBXs (2001-12-11),
5. 5670950 - Private communications network system and method of authentication for a (1997-09-23),
6. 5515034 - Simple communication system capable of message broadcasting (1996-05-07),

Title: Kiyokazu Otsuka: Innovator in Communication Technology

Introduction

Kiyokazu Otsuka is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of communication technology, holding a total of 6 patents. His innovative work focuses on enhancing internal communication systems and mobile communication methods.

Latest Patents

One of Otsuka's latest patents is the "Internal Line Control System." This system involves a telephone equipped with an Internet Protocol (IP) that connects to the Internet. It includes a device for storing the IP address of a private branch exchange and a device for sending a switching request to that IP address while specifying identification information. This allows for seamless control over internal line telephones connected to the Internet, inheriting various settings directly from the private branch exchange.

Another notable patent is the "Private Branch Mobile Communication System and Method." This invention enables hand-over without interruption of communication, allowing a radio terminal to maintain service even when moving between different private branch exchanges. The system utilizes a network common database and local databases to ensure continuous service and effective position registration.

Career Highlights

Kiyokazu Otsuka has dedicated his career to advancing communication technologies. His work at NEC Corporation has positioned him as a key player in the development of innovative communication solutions. His patents reflect a deep understanding of both hardware and software integration in communication systems.

Collaborations

Otsuka has collaborated with notable colleagues such as Minako Takai and Yoshio Itagaki. Their combined expertise has contributed to the successful development of various communication technologies.

Conclusion

Kiyokazu Otsuka's contributions to communication technology through his patents demonstrate his innovative spirit and commitment to enhancing connectivity. His work continues to influence the field, paving the way for future advancements in communication 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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