Company Filing History:

13 out of 42,496

Hitachi, Ltd.

Hitachi Media Electronics Co., Ltd.

patents

where one patent can have more than one assignee

Years Active: 1986-2013

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16 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8474318 - Acceleration sensor (2013-07-02),

2. 8438931 - Semiconductor strain sensor (2013-05-14),

3. 8022433 - Semiconductor sensor device and method for manufacturing same (2011-09-20),

4. 7939938 - Functional device package with metallization arrangement for improved bondability of two substrates (2011-05-10),

5. 7400568 - Optical device, optical pickup and optical disk apparatus (2008-07-15),

6. 7298972 - Optical switch and a control method thereof (2007-11-20),

7. 5938403 - Runner, water wheel and method of manufacturing the same (1999-08-17),

8. 5839880 - Bearing unit, drainage pump and hydraulic turbine each incorporating the (1998-11-24),

9. 5458460 - Drainage pump and a hydraulic turbine incorporating a bearing member, (1995-10-17),

10. 5346316 - Bearing unit, drainage pump and hydraulic turbine each incorporating the (1994-09-13),

11. 5301078 - Magnetic disk unit and manufacturing method of carriage structure thereof (1994-04-05),

12. 5297927 - Vertical shaft type pump (1994-03-29),

13. 5180001 - Heat transfer member (1993-01-19),

14. 5168097 - Laser deposition process for forming an ultrafine-particle film (1992-12-01),

15. 4855102 - Sintering method (1989-08-08),

Title: Ryoji Okada – Innovator in Sensor Technology

Introduction

Ryoji Okada is a notable inventor based in Ibaraki, Japan, recognized for his significant contributions to sensor technology. With a total of 16 patents to his name, Okada has developed innovative solutions that enhance various applications in the field of acceleration and strain sensing.

Latest Patents

Among Okada's latest patents is an innovative acceleration sensor that features a support frame and a weight suspended within it via flexible beams. This design incorporates semiconductor piezoresistance elements that are strategically placed on the beams to detect acceleration by measuring changes in resistance. Additionally, the acceleration sensor includes stress damping sections that provide improved performance while maintaining symmetrical properties concerning the beams' dimensions.

Another noteworthy patent is for a semiconductor strain sensor, which features a strain sensor chip made from a semiconductor substrate with a piezoresistive element. This chip is designed to maintain stable characteristics over time, ensuring consistent performance in measuring strain. It utilizes a metal base plate for attachment, with extending members designed to secure the chip to the object being measured, further enhancing its utility in practical applications.

Career Highlights

Ryoji Okada has had a distinguished career, contributing his expertise to prominent companies such as Hitachi, Ltd. and Hitachi Metals, Ltd. His work in these organizations has allowed him to refine his skills and drive advancements in sensor technology, benefiting his innovations and patents.

Collaborations

Throughout his career, Okada has collaborated with talented individuals in the field, including colleagues Mitsuaki Haneda and Toshihiro Yamada. These collaborations have fostered a dynamic exchange of ideas, contributing to the advancement of sensor technologies that have applications in numerous industries.

Conclusion

Ryoji Okada's dedication to innovation in sensor technology, exemplified through his 16 patents, showcases his role as a significant inventor in this field. His inventions, particularly in acceleration and strain sensing, continue to pave the way for advancements that enhance the performance and capabilities of various applications. As technology evolves, Okada's contributions will undoubtedly remain influential in shaping the future of sensor-related innovations.

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