Company Filing History:

12 out of 42,485

Hitachi, Ltd.

where one patent can have more than one assignee

Years Active: 1991-2020

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12 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 10554065 - Battery control apparatus (2020-02-04),

2. 5577555 - Heat exchanger (1996-11-26),

3. 5517830 - Multiple type absorption air conditioning system (1996-05-21),

4. 5447042 - Multiple type absorption air conditioning system (1995-09-05),

5. 5289868 - Absorption chiller heater and unit-type air conditioning system (1994-03-01),

6. 5282369 - Multiple type absorption air conditioning system (1994-02-01),

7. 5275010 - Control method and apparatus of absorption chiller heater (1994-01-04),

8. 5259202 - Absorption air-conditioning system (1993-11-09),

9. 5218844 - Absorption heat pump apparatus with indoor and outdoor heat exchangers (1993-06-15),

10. 5205137 - Absorption air conditioner (1993-04-27),

11. 5156203 - Air conditioning system (1992-10-20),

12. 5048308 - Absorption refrigerator (1991-09-17),

Title: The Innovative Mind of Daisuke Hisajima

Introduction

Daisuke Hisajima, an accomplished inventor from Ibaraki, Japan, has made significant contributions to technology through his inventive spirit and dedication. With a total of 12 patents under his name, he has focused on advancements in battery technology and heat exchange systems, showcasing his expertise and creativity in engineering.

Latest Patents

His latest innovations include a sophisticated battery control apparatus designed to optimize electricity costs associated with battery charge and discharge cycles. The apparatus features a reduced electricity cost analysis unit, which calculates the costs at discharge and charge times based on the electricity bill structure. It incorporates an introduction cost analysis unit that determines the cost of battery introduction for varying discharge depths, and a charge and discharge depth optimization unit that evaluates these costs to enhance efficiency in battery usage.

Another notable patent is the innovative design of a heat exchanger. This invention consists of a first surface for one fluid and a second surface for another, with a unique configuration that prevents the flow from following an imaginary line parallel to the main flow direction. This design improves fluid dynamics within the exchanger, potentially increasing heat transfer efficiency.

Career Highlights

Daisuke Hisajima has garnered valuable experience working with notable companies such as Hitachi, Ltd. and Hitachi Cable, Inc. Through his roles in these organizations, he has developed a strong foundation in engineering and innovation, leading to his burgeoning portfolio of patents.

Collaborations

Throughout his career, Hisajima has collaborated with esteemed colleagues, including Akira Nishiguchi and Tomihisa Ohuchi. Their teamwork has fostered a creative environment that has contributed to the successful development of various innovative projects and technologies.

Conclusion

Daisuke Hisajima's dedication to innovation and his contributions to engineering exemplify the pioneering spirit of inventors today. Through his patents and collaborations, he continues to pave the way for advancements in technology, impacting industries and improving everyday life. His work not only showcases his capability as an inventor but also inspires future generations to think creatively and strive for technological breakthroughs.

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