Company Filing History:

35 out of 339

Kokusai Denshin Denwa Kabushiki Kaisha

patents

1 out of 1

Kokusai Denshin Denwa K.k.

patent

1 out of 226

Kokusai Denshin Denwa Co., Ltd.

patents

4. 1 out of 1

501 Kokusai Denshin Denwa Kabushiki Kaisha

patent

Years Active: 1985-2000

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38 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6084997 - Coupled waveguide structure (2000-07-04),

2. 5952683 - Functional semiconductor element with avalanche multiplication (1999-09-14),

3. 5663572 - Optical functional semiconductor element (1997-09-02),

4. 5315422 - Optical Mach-Zehnder type logic element which performs an XOR operation (1994-05-24),

5. 5208822 - Semiconductor element having opposite signs of .alpha. parameter (1993-05-04),

6. 5187717 - Tunable semiconductor laser (1993-02-16),

7. 5122844 - Quantum well structure and semiconductor device using the same (1992-06-16),

8. 5019519 - Method for the manufacture of optical semiconductor device (1991-05-28),

9. 4946243 - Optical modulation element (1990-08-07),

10. 4923265 - Light triggering switch (1990-05-08),

11. 4918496 - Infrared emitting device with dislocation free layer (1990-04-17),

12. 4913506 - Optical modulation device (1990-04-03),

13. 4897845 - Semiconductor optical amplifying element (1990-01-30),

14. 4894818 - Optical packet switching system using multi-stage combination of light (1990-01-16),

15. 4874216 - Variable-waveguide optical branching filter (1989-10-17),

Title: Innovations and Contributions of Katsuyuki Utaka

Introduction

Katsuyuki Utaka, located in Musashino, Japan, is a distinguished inventor with an impressive portfolio of 38 patents. His work predominantly focuses on advanced semiconductor technologies, contributing significantly to the field with innovative solutions and designs.

Latest Patents

Among his latest patents, the "Coupled Waveguide Structure" stands out. This invention consists of two closely disposed rectangular waveguides, designed with specific aspect ratios to enhance performance. Another significant patent is the "Functional Semiconductor Element with Avalanche Multiplication," which allows for ultrafast amplification and bistable operations. This unique structure utilizes various configurations of triangular barrier diodes and includes both light absorbing and light emitting layers, making it versatile as an optical functional element. The incorporation of resonant tunneling diodes adds even more innovative functionalities to his designs.

Career Highlights

Katsuyuki Utaka has had substantial professional experiences with notable companies, such as Kokusai Denshin Denwa Kabushiki Kaisha and Kokusai Denshin Denwa K.K., where he applied his expertise in semiconductor technologies and contributed to numerous cutting-edge innovations.

Collaborations

Throughout his career, Utaka has collaborated with esteemed colleagues in the field, including Shigeyuki Akiba and Yuichi Matsushima. These partnerships have fostered a collaborative environment conducive to innovation, pushing the boundaries of technology in their respective areas of expertise.

Conclusion

Katsuyuki Utaka represents the forward-thinking spirit of modern inventors, continuously advancing semiconductor technology through his numerous patents and collaborative efforts. His innovations in coupled waveguide structures and functional semiconductor elements exemplify the critical contributions he has made to the field, establishing him as a significant figure in the realm of contemporary inventors.

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