Kanagawa, Japan

Hirofumi Fujiwara

This inventor holds 2 USPTO granted patents and 1 published patent application. Top assignee: Renesas Electronics Corporation. Active years: 2013-2017.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirofumi Fujiwara. Retrieved from https://idiyas.com/inventor/hirofumi-fujiwara-bj6ehspq

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

Calculating rank
USPTO Granted Patents = 2 

% Patents Active = 50.0

Average Co-Inventor Count = 1.5

ph-index = 1

Forward Citations = 2(Granted Patents)


Company Filing History:


Years Active: 2013-2017

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2 patents (USPTO):Explore Patents

Title: Hirofumi Fujiwara: Innovator in Switching Regulator Technology

Introduction

Hirofumi Fujiwara is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of electronics, particularly in the development of switching regulator control circuits and differential amplifiers. With a total of two patents to his name, Fujiwara's work has had a meaningful impact on efficiency in electronic devices.

Latest Patents

Fujiwara's latest patents include a switching regulator control circuit and a differential amplifier. The switching regulator control circuit addresses the inefficiencies in load monitoring by utilizing an oscillator to generate a carrier signal. This innovation allows for improved efficiency by adjusting the frequency of the carrier signal based on the source-drain voltage of the synchronous rectification transistor. His differential amplifier patent features a unique design that includes a first differential pair and a second differential pair, which work in parallel to enhance performance while reducing capacity under specific voltage conditions.

Career Highlights

Fujiwara is currently employed at Renesas Electronics Corporation, a leading company in semiconductor solutions. His work at Renesas has allowed him to focus on innovative technologies that enhance the performance of electronic devices. His contributions have been recognized within the industry, showcasing his expertise in circuit design and efficiency optimization.

Collaborations

Fujiwara has collaborated with notable colleagues such as Hirokazu Kawagoshi and Yasuhiro Kosaka. These collaborations have fostered an environment of innovation and creativity, leading to advancements in their respective fields.

Conclusion

Hirofumi Fujiwara is a distinguished inventor whose work in switching regulator technology and differential amplifiers has made a significant impact on the electronics industry. His patents reflect a commitment to enhancing efficiency and performance in electronic devices.

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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