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For the Inventor, By the Inventor

Hitachi, Japan

Takeshi Nakajima

This inventor holds 5 USPTO granted patents. Top assignees: Hitachi, Ltd., Hitachi Taga Engineering, Ltd.. Active years: 1995-2000.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takeshi Nakajima. Retrieved from https://idiyas.com/inventor/takeshi-nakajima-w5e4rwcb

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

Calculating rank
USPTO Granted Patents = 5

% Patents Active = 100.0

Average Co-Inventor Count = 3.1

ph-index = 4

Forward Citations = 44(Granted Patents)


Company Filing History:

goldMedal5 out of 42,743 
 
Hitachi, Ltd.
 patents
silverMedal2 out of 6 
 
Hitachi Taga Engineering, Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1995-2000

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5 patents (USPTO):Explore Patents
1. 6118568 - Polygon mirror motor and polygon mirror supporting structure (2000-09-12),
2. 5883455 - Polygon mirror motor and polygon mirror supporting structure (1999-03-16),
3. 5574322 - Motor, a printer having such a motor and a disk drive system having such (1996-11-12),
4. 5541462 - Rotary body bearing apparatus, motor and polygon mirror motor (1996-07-30),
5. 5469008 - Motor with a bearing lubricated by magnetic fluid (1995-11-21),

Title: The Innovations of Takeshi Nakajima

Introduction

Takeshi Nakajima is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of engineering, particularly in the development of polygon mirror technologies. With a total of 5 patents to his name, Nakajima's work has had a lasting impact on various applications.

Latest Patents

Among his latest innovations are the polygon mirror motor and polygon mirror supporting structure. This polygon mirror assembly includes a polygon mirror and a supporting stand designed to support the polygon mirror. The supporting stand and the polygon mirror are combined in a pressure joining manner. This innovative structure allows for easy fastening of the polygon mirror, ensuring that no unbalance of the center of rotation occurs and minimizing any eccentricity.

Career Highlights

Takeshi Nakajima has had a distinguished career, working with prominent companies such as Hitachi, Ltd. and Hitachi Taga Engineering, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking projects in the field of engineering.

Collaborations

Throughout his career, Nakajima has collaborated with talented individuals, including Katsutoshi Nii and Ichiro Hashimoto. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.

Conclusion

Takeshi Nakajima's contributions to the field of engineering, particularly through his polygon mirror technologies, showcase his innovative spirit and dedication to advancing technology. His work continues to influence the industry and inspire future inventors.

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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