Narumi Umeda

This inventor holds 107 USPTO granted patents and 3 published patent applications, plus 6 CIPO patents and 8 EPO patents, primarily in Mobile Communication Systems (CPC class 455 561). Top assignees: Ntt Docomo, Inc., Ntt Mobile Communications Network, Inc., Nippon Telegraph and Telephone Corporation. Active years: 1992-2015.

USPTO Granted Patents = 107 (Patent Applications = 3)

% Patents Active = 39.3

CIPO Patents = 6 (Patent Applications = 1)

EPO Patents = 8 (Patent Applications = 3)

Average Co-Inventor Count = 3.2

ph-index = 24

Forward Citations = 1,763(Granted Patents)

Forward Citations (Not Self Cited) = 1,746(Dec 10, 2025)

Inventors with similar research interests:

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Location History:

Yokohoma, JP (1992)
Yokosukashi, JP (1998)
Yokohamashi, JP (1997 - 1999)
Kanagawaken, JP (1999)
Kanagawa, JP (1992 - 2007)
Tokyo, JP (2009)
Yokohama, JP (1993 - 2013)
Chiyoda-ku, JP (2015)

Company Filing History:

Ntt Mobile Communications Network, Inc.

patents

6 out of 5,300

Nippon Telegraph and Telephone Corporation

patents

where one patent can have more than one assignee

Years Active: 1992-2015

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Areas of Expertise:

Mobile Communication

Packet Communication

Base Station

Radio Resource Control

Mobile Terminal

Transmission Power Control

Channel Quality

Mobility Management

Signal Transmission

Control Apparatus

Communication Method

Ad Hoc Network

107 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8977272 - Mobile communication system, and mobile communication method and radio control device used in mobile communication system (2015-03-10),

2. 8359046 - Control apparatus and mobile terminal (2013-01-22),

3. RE43593 - Base station, radio resource control equipment, mobile station, communication system, and communication method (2012-08-20),

4. 8229418 - Wireless control apparatus and communication method (2012-07-24),

5. 8111652 - Base station, radio communication system, and communication method (2012-02-07),

6. 8036204 - Mobile terminal, control apparatus, home agent and packet communications method (2011-10-11),

7. 8023493 - Mobile terminal, control apparatus, home agent and packet communications method (2011-09-20),

8. 8018915 - Mobile terminal, control apparatus, home agent and packet communications method (2011-09-13),

9. 7970349 - Packet communication system, packet communication method, base station, mobile station, control device, and packet communication program (2011-06-28),

10. 7821982 - Packet communications taking into account channel quality and buffered data amount (2010-10-26),

11. 7813329 - Base station, and a scrambling code setting method (2010-10-12),

12. 7801482 - Packet communication system, packet communication method, base station, mobile station, control device, and packet communication program (2010-09-21),

13. 7801070 - Mobile communication system, mobile terminal transfer device, and mobile communication method (2010-09-21),

14. 7774004 - Reducing paging control traffic in a mobile system by placing router identifications in the uplink pagin request packet (2010-08-10),

15. 7760680 - Prioritized communication between base station and mobile unit (2010-07-20),

Title: The Innovations of Narumi Umeda: A Pioneer in Mobile Communication Systems

Introduction: Narumi Umeda, a distinguished inventor based in Yokohama, Japan, has made significant contributions to the field of mobile communication. With an impressive portfolio of 107 patents, Umeda's work spans various innovations that have shaped modern communication standards.

Latest Patents: Umeda's recent patents reflect the cutting-edge technology he has developed. One of his notable inventions is a mobile communication system that incorporates a first radio control device managing a first cell and a second radio control device overseeing a second cell, with redundancy and handover capabilities. His patent on a control apparatus and mobile terminal describes an innovative paging control mechanism. This apparatus allows for efficient location tracking of mobile terminals using various algorithms tailored to specific mobile devices.

Career Highlights: Throughout his career, Narumi Umeda has been associated with leading companies in the telecommunications sector, including NTT Docomo, Inc. and NTT Mobile Communications Network, Inc. His extensive experience in these organizations has allowed him to develop and refine his innovative ideas in mobile communication technologies.

Collaborations: Umeda has worked alongside accomplished professionals in the industry, including his coworkers Hidetoshi Kayama and Ichiro Okajima. Their collaboration has likely fostered a creative environment that has contributed to the advancement of mobile communication systems.

Conclusion: Narumi Umeda stands out as a prominent figure in the realm of mobile communication innovation. Through his numerous patents, he has contributed significantly to the advancement of technology, ensuring more efficient communication systems for the future. His dedication to innovation continues to inspire the next generation of inventors in the field.