Tokyo, Japan

Toyohiko Fujita

This inventor holds 4 USPTO granted patents. Top assignee: Seikosha Co., Ltd.. Active years: 1989.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toyohiko Fujita. Retrieved from https://idiyas.com/inventor/toyohiko-fujita

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

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 4.0

ph-index = 2

Forward Citations = 17(Granted Patents)


Company Filing History:


Years Active: 1989

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4 patents (USPTO):Explore Patents

Title: Toyohiko Fujita: Innovator in Current Amplification Technology

Introduction

Toyohiko Fujita is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of electronics, particularly in the development of current amplifier circuits. With a total of 4 patents to his name, Fujita's work has had a lasting impact on the industry.

Latest Patents

Fujita's latest patents include a current amplifier circuit and a current amplifying type differential. The current amplifier circuit features a configuration of four transistors, all of the same polarity, designed to enhance input current. The circuit allows for an amplified output current to be obtained across the collector to emitter of the third transistor. Additionally, his differential amplifier circuit incorporates a fifth transistor, which further improves the accuracy of current outputs. Another notable invention is a comparator that sets the comparison level based on the number of transistors used, enhancing the relative accuracy of load resistors and input DC biases.

Career Highlights

Fujita has been associated with Seikosha Co., Ltd., where he has played a crucial role in advancing electronic circuit technology. His innovative designs have contributed to the company's reputation for excellence in the field.

Collaborations

Fujita has collaborated with notable colleagues such as Akira Yamakoshi and Kunihiko Tsukakoshi. Their combined expertise has fostered a creative environment that has led to groundbreaking advancements in their projects.

Conclusion

Toyohiko Fujita's contributions to current amplification technology exemplify his innovative spirit and dedication to the field of electronics. His patents continue to influence the industry, showcasing the importance of creativity and collaboration in technological advancement.

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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