Company Filing History:

15 out of 58,130

Sony Corporation

where one patent can have more than one assignee

Years Active: 1995-2015

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15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8953654 - Semiconductor laser driving circuit and semiconductor laser device including the same (2015-02-10),

2. 8660158 - Semiconductor laser drive circuit and semiconductor laser apparatus (2014-02-25),

3. 7640388 - File storage apparatus for storing file data and management information (2009-12-29),

4. 7565588 - Semiconductor device and data storage apparatus (2009-07-21),

5. 7312629 - Programmable impedance control circuit calibrated at Voh, Vol level (2007-12-25),

6. 7310262 - Ferroelectric memory capable of continuously fast transferring data words in a pipeline (2007-12-18),

7. 7061297 - Input buffer circuit, and semiconductor apparatus having the same (2006-06-13),

8. 6154074 - Semiconductor device with test circuit for high accuracy chip testing (2000-11-28),

9. 5991219 - Semiconductor memory device provided with a sense amplifier having a (1999-11-23),

10. 5896333 - Semiconductor memory testing apparatus (1999-04-20),

11. 5757708 - Semiconductor memory testing apparatus (1998-05-26),

12. 5615157 - Semiconductor memory testing apparatus (1997-03-25),

13. 5566129 - Semiconductor memory device with address transition detector (1996-10-15),

14. 5517144 - Power-on reset circuit (1996-05-14),

15. 5414668 - Semiconductor memory device (1995-05-09),

Title: **Katsuya Nakashima: Innovator in Semiconductor Technology**

Introduction

Katsuya Nakashima is an accomplished inventor based in Nagasaki, Japan, known for his contributions to semiconductor technology. With a remarkable portfolio of 15 patents, his work has significantly advanced the field of optical communications and laser technology.

Latest Patents

Katsuya Nakashima's latest innovations include the "Semiconductor Laser Driving Circuit and Semiconductor Laser Device Including the Same." This invention focuses on a semiconductor laser driving circuit designed to supply a drive current to a semiconductor laser diode. It operates by receiving an input signal at an input terminal, which in turn controls the output terminal. The circuit is intelligently designed with a first supply portion that provides a bias current along with a supply signal of a specified frequency range. The second supply portion is responsible for generating signals with components of higher frequency, enhancing the circuit's efficiency.

Another notable patent is the "Semiconductor Laser Drive Circuit and Semiconductor Laser Apparatus." This invention involves a driving circuit that controls the semiconductor laser diode by providing a predetermined electric current. The design includes a constant electric current source, current sinking and sourcing circuits, and a terminating resistor that accurately matches the resistance of the semiconductor laser diode, ensuring optimal performance and stability during operation.

Career Highlights

Katsuya Nakashima has worked with prestigious companies such as Sony Corporation and Sony Electronics Inc. During his tenure at these companies, he contributed to significant advancements in semiconductor technology, further establishing his reputation as a leading inventor in the field.

Collaborations

Throughout his career, Nakashima has collaborated with notable colleagues like Shumpei Kohri and Yoshifumi Miyajima. These collaborations have fostered innovative ideas and facilitated the development of cutting-edge technology within the semiconductor domain.

Conclusion

Katsuya Nakashima's dedication to innovation and his extensive portfolio of patents underscore his vital role in the semiconductor industry. His contributions, particularly in driving circuits for semiconductor lasers, demonstrate his proficiency and commitment to advancing technology, making him a prominent figure in the realm of inventions related to optical technology.

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