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For the Inventor, By the Inventor

Kawasaki, Japan

Takahisa Kawai

This inventor holds 6 USPTO granted patents. Top assignee: Fujitsu Corporation. Active years: 1990-1999.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takahisa Kawai. Retrieved from https://idiyas.com/inventor/takahisa-kawai

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

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 1.4

ph-index = 5

Forward Citations = 86(Granted Patents)


Company Filing History:

goldMedal6 out of 39,378 
 
Fujitsu Corporation
 patents

Years Active: 1990-1999

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6 patents (USPTO):Explore Patents
1. 5994963 - Amplifier circuit and multistage amplifier circuit (1999-11-30),
2. 5808515 - Semiconductor amplifying circuit having improved bias circuit for (1998-09-15),
3. D397092 - Integrated circuit package (1998-08-18),
4. 5477083 - Chip carrier for enabling production of high performance microwave (1995-12-19),
5. 5210599 - Semiconductor device having a built-in capacitor and manufacturing (1993-05-11),
6. 4972237 - Metal-semiconductor field effect transistor device (1990-11-20),

Title: Takahisa Kawai: Innovator in Amplifier Circuit Technology

Introduction

Takahisa Kawai is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of amplifier circuit technology, holding a total of 6 patents. His work focuses on enhancing the performance and efficiency of semiconductor amplifying circuits.

Latest Patents

Kawai's latest patents include innovative designs for amplifier circuits. One notable invention is an amplifier circuit that features a first FET of an enhancement type, which is supplied with an input signal and a gate bias voltage. This circuit also includes a second FET that is designed to control the drain voltage supplied to the first FET. Another significant patent is a semiconductor amplifying circuit that incorporates a bias circuit to improve the performance of the amplifying transistor device. This circuit utilizes a first dummy field effect transistor and a voltage feedback bias circuit to optimize the bias voltage supplied to the amplifying transistor.

Career Highlights

Takahisa Kawai is currently employed at Fujitsu Corporation, where he continues to develop cutting-edge technologies in the field of electronics. His work has been instrumental in advancing the capabilities of amplifier circuits, making them more efficient and reliable.

Collaborations

Kawai has collaborated with notable colleagues such as Yoshiaki Sano and Takashi Yoshida. These partnerships have fostered innovation and contributed to the successful development of various technologies in their field.

Conclusion

Takahisa Kawai is a distinguished inventor whose work in amplifier circuit technology has led to several important patents. His contributions continue to influence the electronics industry, showcasing the impact of innovative thinking in technology development.

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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