logo

For the Inventor, By the Inventor

Yokohama, Japan

Tsutomu Matsumoto

This inventor holds 16 USPTO granted patents and 1 published patent application and 2 EPO patents. Top assignees: Hitachi, Ltd., Yokohama National University, Fujitsu Corporation. Active years: 1979-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tsutomu Matsumoto. Retrieved from https://idiyas.com/inventor/tsutomu-matsumoto

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

USPTO Granted Patents = 16 

% Patents Active = 56.3


Average Co-Inventor Count = 4.7

ph-index = 9

Forward Citations = 323(Granted Patents)


Location History:

  • Chigasaki, JP (1979)
  • Kawasaki, JP (2008)
  • Yokohama, JP (2004 - 2021)

Company Filing History:

goldMedal5 out of 42,731 
 
Hitachi, Ltd.
 patents
silverMedal5 out of 100 
 
Yokohama National University
 patents
bronzeMedal3 out of 39,374 
 
Fujitsu Corporation
 patents
4. 3 out of 38,912 
 
Toyota Jidosha Kabushiki Kaisha
 patents
5. 1 out of 40 
 
Amano Corporation
 patents
6. 1 out of 53,262 
 
Kabushiki Kaisha Toshiba
 patents
7. 1 out of 5,300 
 
Nippon Telegraph and Telephone Corporation
 patents
8. 1 out of 10,641 
 
Sumitomo Electric Industries, Limited
 patents
9. 1 out of 2,887 
 
Victor Company of Japan, Limited
 patents
where one patent can have more than one assignee

Years Active: 1979-2025

Loading Chart...
Loading Chart...
16 patents (USPTO):Explore Patents
1. 12259830 - Device and method (2025-03-25),
2. 11189974 - Connector system, connector, and connection method (2021-11-30),
3. 10397244 - System and method for detecting attack when sensor and traffic information are inconsistent (2019-08-27),
4. 10270768 - Communication system, communication method, and communication device (2019-04-23),
5. 9331854 - Message authentication method in communication system and communication system (2016-05-03),
6. 8547201 - Protective-control measuring system and device and data transmission method (2013-10-01),
7. 7770009 - Digital signing method (2010-08-03),
8. 7526645 - Electronic document authenticity assurance method and electronic document disclosure system (2009-04-28),
9. 7424732 - Card settlement method and system using mobile information terminal (2008-09-09),
10. 7305558 - Digital signing method (2007-12-04),
11. 7266698 - Time stamping system for electronic documents and program medium for the same (2007-09-04),
12. 7200682 - Time stamp generating system (2007-04-03),
13. 6819650 - Optical disc having land pre-pits and variable groove depths (2004-11-16),
14. 6816969 - Digital signature generating method and digital signature verifying method (2004-11-09),
15. 6769063 - Data converter and recording medium on which program for executing data conversion is recorded (2004-07-27),

Title: Tsutomu Matsumoto: Innovator in Connector Technology

Introduction

Tsutomu Matsumoto is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of connector technology, holding a total of 16 patents. His work has been influential in advancing communication systems and enhancing the functionality of connectors.

Latest Patents

Matsumoto's latest patents include a device and method that features a first interface unit connected to a first controller area network (CAN) bus and a second interface unit connected to a second CAN bus. This device is designed to identify the CAN bus that is in a dominant state after the end of arbitration, facilitating efficient communication. Another notable patent is a connector system that includes a first connector with a first transmission line and a second connector with a processing unit. This system performs an information transmission process to verify connections, ensuring reliable data transfer.

Career Highlights

Throughout his career, Matsumoto has worked with esteemed organizations such as Hitachi, Ltd. and Yokohama National University. His experience in these institutions has allowed him to develop innovative solutions that address complex engineering challenges.

Collaborations

Matsumoto has collaborated with notable colleagues, including Kunihiko Miyazaki and Ryoichi Sasaki. These partnerships have contributed to the advancement of technology in their respective fields.

Conclusion

Tsutomu Matsumoto's contributions to connector technology and his extensive patent portfolio highlight his role as a leading inventor. His work continues to influence the industry and pave the way for future innovations.

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]
Loading…