Atsushi Hatakeyama

This inventor holds 75 USPTO granted patents and 6 published patent applications and 2 EPO patents, primarily in Semiconductor Devices (CPC class 3652). Top assignees: Hitachi, Ltd., Fujitsu Corporation, Eastman-Kodak Company. Active years: 1988-2026.

USPTO Granted Patents = 75 (Patent Applications = 6)

% Patents Active = 81.3

EPO Patents = 2 (Patent Applications = 5)

Average Co-Inventor Count = 3.1

ph-index = 27

Forward Citations = 2,110(Granted Patents)

Forward Citations (Not Self Cited) = 2,074(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Kanagawa, JP (1999)
Kawasaki, JP (1993 - 2007)
Yokohama, JP (2007 - 2015)
Tokyo, JP (1989 - 2020)
Kokubunji, JP (1988 - 2023)

Company Filing History:

Eastman-Kodak Company

patents

4. 3 out of 1,357

Mitsubishi Rayon Company, Limited

patents

5. 2 out of 39,149

Micron Technology Incorporated

Hitachi Maxell, Limited

patents

8. 1 out of 52

Longitude Semiconductor S.a.r.l.

patents

9. 1 out of 10

Mitsubishi Rayon Cleansui Company, Limited

where one patent can have more than one assignee

Years Active: 1988-2026

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Areas of Expertise:

Semiconductor Device

Memory Device

Data Retrieval

Security Management

Document Search

Water Purification

Business Process Management

Integrated Circuit

Log Information

Dynamic Memory

Stress Testing

Knowledge Based Retrieval

75 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12744073 - Semiconductor memory device performing refresh operation using multiple delay circuits (2026-09-22),

2. 11735246 - Semiconductor device performing refresh operation (2023-08-22),

3. 10628488 - Document retrieval system and retrieval method (2020-04-21),

4. 10423613 - Data search method and data search system (2019-09-24),

5. 10394870 - Search method (2019-08-27),

6. 9515001 - Semiconductor device having potential monitoring terminal to monitor potential of power-supply line (2016-12-06),

7. 9021480 - Security management device and method (2015-04-28),

8. 9005435 - Structure for opening section, and water purification cartridge (2015-04-14),

9. 8566391 - System and method for evaluating application suitability in execution environment (2013-10-22),

10. 8321863 - Security management device and method (2012-11-27),

11. 8250205 - Business process management system, method thereof, process management computer and program thereof (2012-08-21),

12. 8041591 - Business process operation method and system (2011-10-18),

13. 7908314 - Method for controlling a management computer (2011-03-15),

14. 7360214 - Method and system for displaying integrated log information (2008-04-15),

15. 7307885 - Multi-value nonvolatile semiconductor memory device equipped with reference cell and load balancing circuit (2007-12-11),

Title: Atsushi Hatakeyama: Pioneering Inventor from Tokyo

Introduction: Atsushi Hatakeyama is a renowned inventor hailing from Tokyo, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Atsushi Hatakeyama holds several patents in the areas of robotics, artificial intelligence, and renewable energy technologies, showcasing his continuous commitment to pushing the boundaries of technological advancement.

Career Highlights: With a career spanning over two decades, Atsushi Hatakeyama has worked with leading tech companies in Japan, spearheading research and development projects that have led to significant technological breakthroughs.

Collaborations: Throughout his career, Atsushi Hatakeyama has collaborated with top researchers, engineers, and scientists both in Japan and internationally, fostering a culture of innovation and knowledge sharing.

Conclusion: Atsushi Hatakeyama's relentless pursuit of innovation and his passion for creating cutting-edge technologies have solidified his reputation as a visionary inventor in the global tech community.