Company Filing History:

14 out of 35,670

Nec Corporation

where one patent can have more than one assignee

Years Active: 1993-2016

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15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9343902 - Uninterruptible power supply apparatus and control method (2016-05-17),

2. 8065645 - Logic circuit, logic circuit design method, logic circuit design system, and logic circuit design program (2011-11-22),

3. 7352067 - Stacked semiconductor device (2008-04-01),

4. 7330368 - Three-dimensional semiconductor device provided with interchip interconnection selection means for electrically isolating interconnections other than selected interchip interconnections (2008-02-12),

5. 7236006 - Logic circuit, logic circuit design method, logic circuit design system, and logic circuit design program (2007-06-26),

6. 7221614 - Stacked semiconductor memory device (2007-05-22),

7. 7209376 - Stacked semiconductor memory device (2007-04-24),

8. 6918050 - Delay adjustment circuit and a clock generating circuit using the same (2005-07-12),

9. 6429688 - Semiconductor integrated circuit (2002-08-06),

10. 6329844 - Semiconductor integrated circuit (2001-12-11),

11. 6229340 - Semiconductor integrated circuit (2001-05-08),

12. 5430668 - Floating point multiplier capable of easily performing a failure (1995-07-04),

13. 5426598 - Adder and multiplier circuit employing the same (1995-06-20),

14. 5331581 - Artificial random-number pattern generating circuit (1994-07-19),

15. 5231415 - Booth's multiplying circuit (1993-07-27),

Title: Yasuhiko Hagihara: Innovator in Power Supply and Logic Circuit Design

Introduction

Yasuhiko Hagihara is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the fields of power supply apparatus and logic circuit design. With a total of 15 patents to his name, his work has had a lasting impact on technology.

Latest Patents

Hagihara's latest patents include an uninterruptible power supply apparatus and control method. This invention involves a second DC power-supply voltage obtained by outputting a first DC power-supply voltage from an AC power supply through an AC-DC converter circuit. The system utilizes PWM switching to smooth and feed the output DC power-supply voltage to a load. Additionally, the first DC power-supply voltage is supplied to a battery for charging, while a third power-supply voltage from the battery is output to the first switch.

Another notable patent focuses on a logic circuit design method, system, and program. This invention features a latch conversion circuit that can be added to a basic logic circuit to create a latch circuit with minimal through delay. The design allows for the absorption of clock edge shifts, such as skew or jitter, ensuring that the latch circuit remains unaffected by these variations.

Career Highlights

Throughout his career, Yasuhiko Hagihara has worked with notable companies, including NEC Corporation and Elpida Memory, Inc. His experience in these organizations has contributed to his expertise in developing innovative technologies.

Collaborations

Hagihara has collaborated with several talented individuals in the industry, including Muneo Fukaishi and Hideaki Saito. These partnerships have further enriched his work and led to advancements in his field.

Conclusion

Yasuhiko Hagihara is a distinguished inventor whose contributions to power supply and logic circuit design continue to influence the technology landscape. His innovative patents and collaborations highlight his commitment to advancing engineering solutions.

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