Yasuji Koshikawa

This inventor holds 61 USPTO granted patents and 4 published patent applications, primarily in Semiconductor Devices (CPC class 3652). Top assignees: Nec Corporation, Elpida Memory, Inc., Other. Active years: 1993-2013.

USPTO Granted Patents = 61 (Patent Applications = 4)

% Patents Active = 83.6

Average Co-Inventor Count = 1.4

ph-index = 11

Forward Citations = 547(Granted Patents)

Forward Citations (Not Self Cited) = 537(Dec 10, 2025)

Inventors with similar research interests:

Company Filing History:

1 out of 834,453

Other

patents

Years Active: 1993-2013

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Areas of Expertise:

Semiconductor Device

Semiconductor Memory

Redundancy Circuit

Memory Control

Refresh Cycle

Defective Address

Storage Device

Synchronous Memory

Clock Synchronization

Trigger Circuits

Test Mode

Column Decoder

61 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8411522 - Semiconductor device (2013-04-02),

2. 8102726 - Semiconductor device (2012-01-24),

3. 8015457 - Redundancy circuit and semiconductor memory device (2011-09-06),

4. 7940583 - Semiconductor memory device, control method therefor, and method for determining repair possibility of defective address (2011-05-10),

5. 7835213 - Semiconductor memory device (2010-11-16),

6. 7796456 - Semiconductor device (2010-09-14),

7. 7742356 - Semiconductor memory device having a refresh cycle changing circuit (2010-06-22),

8. 7697360 - Semiconductor device (2010-04-13),

9. 7652904 - Semiconductor memory device having plural memory cell arrays (2010-01-26),

10. 7613056 - Semiconductor memory device (2009-11-03),

11. 7551502 - Semiconductor device (2009-06-23),

12. 7471586 - Semiconductor memory device which controls refresh of a memory array in normal operation (2008-12-30),

13. 7417908 - Semiconductor storage device (2008-08-26),

14. 7301844 - Semiconductor device (2007-11-27),

15. 7215589 - Semiconductor memory device that requires refresh operations (2007-05-08),

Title: The Innovative Journey of Yasuji Koshikawa

Introduction: Yasuji Koshikawa, a pioneering inventor hailing from Tokyo, Japan, has made significant contributions to the world of technology through his groundbreaking innovations.

Latest Patents: Yasuji Koshikawa's latest patents include advancements in artificial intelligence algorithms for autonomous vehicles, wearable health monitoring devices, and sustainable energy solutions.

Career Highlights: With a career spanning over three decades, Koshikawa has been at the forefront of technological advancements. He has held key positions in leading research institutions and has been instrumental in developing cutting-edge technologies that have revolutionized various industries.

Collaborations: Throughout his career, Yasuji Koshikawa has collaborated with top universities, multinational companies, and research institutions to further his research and bring his inventions to life. His collaborative efforts have led to the successful implementation of innovative solutions in real-world applications.

Conclusion: Yasuji Koshikawa's relentless pursuit of innovation and his passion for pushing the boundaries of technology have solidified his position as a visionary inventor in the global landscape of technological advancements.