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For the Inventor, By the Inventor

Aki-gun, Japan

Junji Umemura

This inventor holds 7 USPTO granted patents and 4 published patent applications. Top assignee: Mazda Motor Corporation. Active years: 2016-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Junji Umemura. Retrieved from https://idiyas.com/inventor/junji-umemura

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

USPTO Granted Patents = 7 

% Patents Active = 85.7

Average Co-Inventor Count = 4.5

ph-index = 1

Forward Citations = 4(Granted Patents)


Location History:

  • Hiroshima, JP (2019)
  • Aki-gun, JP (2016 - 2020)

Company Filing History:

goldMedal7 out of 4,748 
 
Mazda Motor Corporation
 patents

Years Active: 2016-2020

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7 patents (USPTO):Explore Patents
1. 10584655 - Engine exhaust device (2020-03-10),
2. 10408120 - Opening/closing valve structure (2019-09-10),
3. 10260404 - Engine supercharger (2019-04-16),
4. 10196969 - Exhaust device for engine (2019-02-05),
5. 10180103 - Engine supercharger (2019-01-15),
6. 9416725 - Turbocharging device of engine for vehicle (2016-08-16),
7. 9388770 - Exhaust gas recirculation system for engine (2016-07-12),

Title: Junji Umemura: Innovator in Engine Technology

Introduction

Junji Umemura is a prominent inventor based in Aki-gun, Japan. He has made significant contributions to engine technology, holding a total of 7 patents. His work focuses on enhancing engine performance and efficiency through innovative exhaust and valve systems.

Latest Patents

One of Umemura's latest patents is an engine exhaust device. This device features an exhaust passage that includes both high-speed and low-speed passages. A turbine housing is connected to the exhaust passage downstream from the collector. The exhaust device incorporates a variable valve that opens and closes the first passage. The engine controller plays a crucial role by closing the valve when the engine speed is below a predetermined threshold and opening it when the speed meets or exceeds that threshold. Notably, the controller can also open the valve during fuel cut control, even if the engine speed is low.

Another significant patent is the opening/closing valve structure for an engine. This structure consists of a valve body that regulates the intake or exhaust passage of the engine. It includes a pair of bush members mounted on the axial ends of the valve body and a shaft member that passes through one of the bush members. The design ensures that the shaft member's relative rotation with respect to the valve body is disabled, enhancing the reliability of the valve operation.

Career Highlights

Junji Umemura is currently employed at Mazda Motor Corporation, where he continues to innovate in the field of engine technology. His work has been instrumental in developing advanced systems that improve engine performance and reduce emissions.

Collaborations

Umemura has collaborated with notable colleagues, including Shuhei Tsujita and Einosuke Suekuni. Their combined expertise has contributed to the successful development of various engine technologies.

Conclusion

Junji Umemura's contributions to engine technology through his patents and work at Mazda Motor Corporation highlight his role as a leading inventor in the automotive industry. His innovative solutions continue to shape the future of engine performance and efficiency.

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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