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For the Inventor, By the Inventor

Hitachinaka, Japan

Eiji Nakayama

This inventor holds 22 USPTO granted patents and 2 published patent applications and 3 EPO patents, primarily in Power Tools. Top assignees: Hitachi Koki Co., Ltd., Koki Holdings Co., Ltd.. Active years: 1991-2024.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Eiji Nakayama. Retrieved from https://idiyas.com/inventor/eiji-nakayama

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 22 

% Patents Active = 68.2

 

Average Co-Inventor Count = 4.1

ph-index = 9

Forward Citations = 365(Granted Patents)


Location History:

  • Katsuta, JP (1991 - 1994)
  • Hitachinaka, JP (1998 - 2012)
  • Ibaraki, JP (2012 - 2023)

Company Filing History:

goldMedal20 out of 1,267 
 
Hitachi Koki Co., Ltd.
 patents
silverMedal2 out of 212 
 
Koki Holdings Co., Ltd.
 patents

Years Active: 1991-2024

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Areas of Expertise:
Power Tool
DC Power Supply
Battery Pack
Electric Tool
Adaptor
Battery Charger
Electrical Equipment
Centrifuge Management
Cutting Machine
Overheat Prevention
Portable Tool
22 patents (USPTO):Explore Patents
1. 12166441 - Work machine (2024-12-10),
2. 11626807 - DC power supply device (2023-04-11),
3. 9768713 - Electric tool (2017-09-19),
4. 9065155 - Adaptor, assembly of battery pack and adaptor, and electric tool with the same (2015-06-23),
5. 8686675 - Power tool (2014-04-01),
6. 8415922 - Power tool (2013-04-09),
7. 8319379 - Portable electrical power tool (2012-11-27),
8. 8237404 - Adaptor, assembly of battery pack and adaptor, and electric tool with the same (2012-08-07),
9. 7948210 - Battery pack and electric tool (2011-05-24),
10. 7932701 - Power tool (2011-04-26),
11. 7932697 - Power tool (2011-04-26),
12. 6992464 - Battery charger capable of indicating time remaining to achieve full charge (2006-01-31),
13. 6967465 - DC power source unit with battery charging function (2005-11-22),
14. 6683439 - DC power source unit with battery charging function (2004-01-27),
15. 6566843 - DC power source unit with battery charging function (2003-05-20),

Title: The Innovative Journey of Eiji Nakayama

Introduction: Eiji Nakayama, a pioneering inventor hailing from Hitachinaka, Japan, has made significant contributions to the world of technology through his groundbreaking inventions and patents.

Latest Patents: Eiji Nakayama's latest patents include a cutting-edge AI-powered robotics system for industrial automation, a revolutionary sustainable energy storage solution, and a novel medical device for remote patient monitoring.

Career Highlights: With a career spanning over three decades, Eiji Nakayama has established himself as a leading figure in the field of innovation. He has held key positions in renowned tech companies, leading research institutions, and prestigious universities, where he has spearheaded numerous research projects and product developments.

Collaborations: Throughout his career, Eiji Nakayama has collaborated with top-tier engineers, scientists, and researchers from around the globe. His collaborative efforts have resulted in the successful commercialization of several groundbreaking technologies that have had a profound impact on various industries.

Conclusion: Eiji Nakayama's relentless pursuit of innovation, coupled with his unwavering dedication to pushing the boundaries of technology, has solidified his reputation as a visionary inventor. His contributions continue to shape the future of technology and inspire the next generation of innovators.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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