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For the Inventor, By the Inventor

Hitachi, Japan

Eiji Tsuji

This inventor holds 7 USPTO granted patents. Top assignee: Hitachi, Ltd.. Active years: 1990-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Eiji Tsuji. Retrieved from https://idiyas.com/inventor/eiji-tsuji-12utak5f

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

Calculating rank
USPTO Granted Patents = 7

% Patents Active = 100.0

Average Co-Inventor Count = 9.1

ph-index = 4

Forward Citations = 29(Granted Patents)


Company Filing History:

goldMedal7 out of 42,743 
 
Hitachi, Ltd.
 patents

Years Active: 1990-2003

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7 patents (USPTO):Explore Patents
1. 6538351 - Rotating machine with plural coolers in plural ventilation passages (2003-03-25),
2. 6359351 - Rotating machine (2002-03-19),
3. 6265795 - Rotating machine (2001-07-24),
4. 6262502 - Rotating machine (2001-07-17),
5. 6262501 - Rotating machine (2001-07-17),
6. 6201323 - Rotating machine (2001-03-13),
7. 4926541 - Method of assembling wound rotor of vertical type adjustable speed (1990-05-22),

Title: Eiji Tsuji: Innovator in Rotating Machine Technology

Introduction

Eiji Tsuji is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of rotating machine technology, holding a total of 7 patents. His innovative designs focus on enhancing the efficiency and functionality of rotating machines.

Latest Patents

Tsuji's latest patents include a rotating machine with plural coolers in plural ventilation passages. This invention features a rotating machine equipped with a stator core and coolers designed to cool a circulating cooling medium. The coolers are strategically installed in ventilation passages, allowing for improved cooling efficiency. Another notable patent is a rotating machine that also incorporates coolers for cooling a cooling medium, emphasizing the importance of effective heat management in rotating machinery.

Career Highlights

Eiji Tsuji has dedicated his career to advancing technology at Hitachi, Ltd. His work has been instrumental in developing innovative solutions that address the challenges faced by rotating machines. His expertise and commitment to innovation have positioned him as a key figure in his field.

Collaborations

Throughout his career, Tsuji has collaborated with notable colleagues, including Shinsaku Hakuta and Akitomi Semba. These partnerships have fostered a collaborative environment that encourages the exchange of ideas and the development of groundbreaking technologies.

Conclusion

Eiji Tsuji's contributions to rotating machine technology exemplify the spirit of innovation. His patents reflect a deep understanding of engineering principles and a commitment to improving machine efficiency. Tsuji's work continues to influence the industry and inspire future advancements in technology.

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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