Kariya, Japan

Yoshihiko Ooyama

This inventor holds 1 USPTO granted patent and 1 published patent application. Top assignee: Nippondenso Co., Ltd.. Active years: 1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshihiko Ooyama. Retrieved from https://idiyas.com/inventor/yoshihiko-ooyama

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

USPTO Granted Patents = 1 

% Patents Active = 100.0

Average Co-Inventor Count = 3.0

ph-index = 1

Forward Citations = 55(Granted Patents)


Company Filing History:


Years Active: 1997

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1 patent (USPTO):Explore Patents

Title: Innovations of Yoshihiko Ooyama in Electric Vehicle Technology

Introduction

Yoshihiko Ooyama is a notable inventor based in Kariya, Japan. He has made significant contributions to the field of electric vehicle technology, particularly in battery charging systems. His innovative approach has led to the development of a unique battery charger that enhances the efficiency of electric vehicle charging.

Latest Patents

Ooyama holds a patent for a battery charging system designed for electric vehicles. This system includes a primary side circuit, a transformer, a secondary side circuit, and a control circuit. The secondary side circuit features a first output unit and a second output unit, allowing the battery to charge both a main battery and an auxiliary battery. The first output unit, connected to the main battery, incorporates an integrated rectifier-converter and a smoothing circuit. This integrated rectifier-converter is constructed using MOSFETs. When charging the auxiliary battery with power from the main battery, the system converts power from the main battery to AC power, which induces power in an output winding of a transformer connected to the auxiliary battery. Ooyama's innovative design is a testament to his expertise in electrical engineering.

Career Highlights

Yoshihiko Ooyama is associated with Nippondenso Co., Ltd., a company known for its advancements in automotive technology. His work at Nippondenso has allowed him to focus on developing cutting-edge solutions for electric vehicles. Ooyama's dedication to innovation has positioned him as a key figure in the industry.

Collaborations

Throughout his career, Ooyama has collaborated with talented individuals such as Hiroshi Matsumae and Keiichiro Banzai. These collaborations have fostered a creative environment that encourages the exchange of ideas and the development of groundbreaking technologies.

Conclusion

Yoshihiko Ooyama's contributions to electric vehicle technology, particularly through his patented battery charging system, highlight his role as an influential inventor. His work continues to impact the automotive industry positively, paving the way for more efficient electric vehicle solutions.

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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