Company Filing History:

13 out of 39,244

Fujitsu Corporation

patents

2 out of 5,290

Nippon Telegraph and Telephone Corporation

The University of Tokyo

patents

where one patent can have more than one assignee

Years Active: 1990-2021

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14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 10955727 - Wavelength converter and transmission apparatus (2021-03-23),

2. 8441706 - Optical module, optical control method by optical module, optical switch, and optical switching method (2013-05-14),

3. 7266308 - Light output control circuit (2007-09-04),

4. 7068747 - Data decision circuit using clock signal which has phase optimized with respect to phase of input data signal (2006-06-27),

5. 6975813 - Light output control device (2005-12-13),

6. 5878025 - ATM switch and method for switching path by ATM switch (1999-03-02),

7. 5696759 - Apparatus for high-speed packet switching in a broadband ISDN (1997-12-09),

8. 5610913 - Switching equipment for performing a switching operation for a (1997-03-11),

9. 5515386 - Transmission circuit for transmitting fixed-length data (1996-05-07),

10. 5408476 - One bit error correction method having actual data reproduction function (1995-04-18),

11. 5265088 - Cross-connection apparatus for B-ISDN (1993-11-23),

12. 5257311 - System for monitoring ATM cross-connecting apparatus by inside-apparatus (1993-10-26),

13. 5001726 - Circuit for generating discrimination voltage level (1991-03-19),

14. 4935701 - Phase shift circuit (1990-06-19),

Title: Inventor Masaaki Kawai - A Pioneer in Optical Innovations

Introduction

Masaaki Kawai, an accomplished inventor based in Kawasaki, Japan, has made significant contributions to the field of optical systems. With an impressive portfolio of 14 patents, Kawai is recognized for his ingenuity and innovative spirit, particularly in wavelength conversion and optical module technologies.

Latest Patents

Among his latest patents are groundbreaking innovations such as the Wavelength Converter and Transmission Apparatus. This invention encompasses an excitation light source that outputs excitation light, a beam splitter for dividing the inputted excitation light and optical signal into two polarization components, and a non-linear optical fiber that enhances signal transmission efficiency. Another noteworthy patent is the Optical Module, which includes a mirror for reflecting input light and a mirror control section that allows for dynamic adjustments of the mirror’s reflecting surface. This adaptation changes the optical coupling characteristics of the output light, showcasing Kawai's contributions to advanced optical control methods.

Career Highlights

Throughout his career, Masaaki Kawai has worked for prominent organizations, including Fujitsu Corporation and Nippon Telegraph and Telephone Corporation. His work in these companies has positioned him as a significant player in the ongoing evolution of telecommunications and optical technologies.

Collaborations

Kawai has collaborated with notable coworkers such as Hidetoshi Naito and Hisako Watanabe, enhancing the collective expertise and innovation within their fields. These collaborations have furthered the development of cutting-edge technology and have led to pioneering solutions in optical applications.

Conclusion

Masaaki Kawai's influence in the realm of optical inventions is undeniable. With a strong foundation in research and a commitment to innovation, he continues to pave the way for future advancements in optical technology. His patents not only reflect his individual achievements but also contribute to the broader landscape of technological development.

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