% Expired Patents = 28.6

Trademarks = 1

Forward Citations = 68

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11 inventors (with patents filed for the assignee):

Yukifumi Machida (6 out of 14 patents)

Yoshikazu Tanaka (3 out of 76 patents)

Michiyasu Watanabe (3 out of 6 patents)

4. Yoshikatsu Hasegawa (3 out of 5 patents)

5. Tsugio Anbo (3 out of 9 patents)

6. Ryo Sawada (2 out of 2 patents)

7. Katsuzi Shimazawa (2 out of 2 patents)

8. Kenichi Suzuki (1 out of 89 patents)

9. Akihiro Kojima (1 out of 125 patents)

10. Yukihumi Machida (1 out of 1 patent)

11. Hideo Kon (1 out of 1 patent)

7 patents: Sort by Forward Citations

1. 6699079 - Electric connector permitting testing of electric conductivity of terminals in provisional locking position (2004-03-02),

2. 6558206 - Electric connector (2003-05-06),

3. 6171140 - Joint connector (2001-01-09),

4. 6165009 - Housing accomodating a plurality of flat cables (2000-12-26),

5. 6083025 - Connector (2000-07-04),

6. 5879192 - Electrical connector (1999-03-09),

7. 5702272 - Connecting terminal and method or manufacturing the same (1997-12-30),

Company Overview

Ryosei Electro-circuit Systems, Ltd. is a leading provider of high-quality electro-circuit systems, specializing in the design and manufacturing of cutting-edge electronic components for various industries. With a proven track record of delivering innovative solutions, Ryosei Electro-circuit Systems, Ltd. is committed to excellence and customer satisfaction.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

7 Patents

#2,287 in Tokyo

#5,456 in Japan

Tokyo, Japan

Ryosei Electro-Circuit Systems, Ltd.

Forward Citations = 68

11 inventors:

Yukifumi Machida (6 out of 14 patents)

Yoshikazu Tanaka (3 out of 76 patents)

Michiyasu Watanabe (3 out of 6 patents)

4. Yoshikatsu Hasegawa (3 out of 5 patents)

5. Tsugio Anbo (3 out of 9 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ryosei Electro-Circuit Systems, Ltd.. Retrieved from https://idiyas.com/company/ryosei-electro-circuit-systems

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

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]