Sosaku Sawada

This inventor holds 20 USPTO granted patents, primarily in Optical Amplifiers. Top assignee: Sumitomo Electric Industries, Limited. Active years: 1995-2015.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Sosaku Sawada. Retrieved from https://idiyas.com/inventor/sosaku-sawada

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

Calculating rank

USPTO Granted Patents = 20

% Patents Active = 100.0

Average Co-Inventor Count = 2.5

ph-index = 8

Forward Citations = 472(Granted Patents)

Company Filing History:

20 out of 10,652

Sumitomo Electric Industries, Limited

patents

Years Active: 1995-2015

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Areas of Expertise:

Driver Circuit

Optical Receiver

Traveling Wave Amplifier

Differential Amplifier

Optical Module

Semiconductor Laser

Photoelectric Conversion

Noise Compensation

Conversion Circuit

Flexible Structure

Opto-Electronic Integrated Circuit

Optical Link Apparatus

20 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9182617 - Driver circuit configured with travelling wave amplifier (2015-11-10),

2. 8987650 - Front end module for optical receiver (2015-03-24),

3. 8907722 - Traveling wave amplifier with suppressed jitter (2014-12-09),

4. 8816772 - Differential amplifier with function of variable gain and optical receiver implemented with the same (2014-08-26),

5. 8704592 - Traveling wave amplifier with pre-emphasis function (2014-04-22),

6. 8390383 - Amplifier for receiving intermittent optical signal (2013-03-05),

7. 8362841 - Conversion circuit from single phase signal to differential phase signal (2013-01-29),

8. 6567441 - Source follower circuit, laser driving apparatus, semiconductor laser apparatus, current-voltage convertion circuit, and light receiving circuit (2003-05-20),

9. 6257773 - Optical module and optical reflecting member (2001-07-10),

10. 6213650 - Method of making optical module (2001-04-10),

11. 6004046 - Optical module and method of making the same (1999-12-21),

12. 5880582 - Current mirror circuit and reference voltage generating and light (1999-03-09),

13. D396210 - Optical receiver/transmitter module (1998-07-21),

14. 5742480 - Optical module circuit board having flexible structure (1998-04-21),

15. 5712504 - Pin type light-receiving device, opto electronic conversion circuit, and (1998-01-27),

Title: Innovator Spotlight: Sosaku Sawada

Introduction

Sosaku Sawada, an accomplished inventor based in Yokohama, Japan, has made significant contributions in the field of electronics and optical communications. With a remarkable portfolio of 20 patents, Sawada is known for his innovative designs that address the evolving needs of technology and engineering.

Latest Patents

Two of Sosaku Sawada's latest patented inventions highlight his expertise and forward-thinking approach. The first is a "Driver Circuit Configured with Travelling Wave Amplifier." This invention features a driver equipped with a travelling wave amplifier arrangement that enhances input signal processing through an innovative open collector configuration. The design incorporates multiple cells arranged between an input and output interconnection, thus optimizing performance.

The second patent is a "Front End Module for Optical Receiver." This cutting-edge module integrates a photodetector (PD) and a trans-impedance amplifier (TIA) within an insulating carrier. The sophisticated design employs dual metal films to facilitate efficient current transfer while minimizing resonances in the trans-impedance spectrum, thereby enhancing the performance of optical receivers.

Career Highlights

Sosaku Sawada is a pivotal member of Sumitomo Electric Industries, Limited, where his contributions significantly impact technological advancements. His work encompasses various projects focusing on improving communication infrastructure and electronic devices, positioning himself as a key innovator in the industry.

Collaborations

Throughout his career, Sawada has collaborated with esteemed colleagues, including Takeshi Sekiguchi and Nobuo Shiga. Together, they have fostered an environment of innovation and creativity, pushing the boundaries of what is possible in their respective fields.

Conclusion

Sosaku Sawada's inventions not only demonstrate his technical expertise but also reflect a keen understanding of market needs and future technological trends. His dedication to innovation continues to inspire and pave the way for advancements in electronics and optical communications, solidifying his legacy as a leading inventor in modern technology.

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]