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For the Inventor, By the Inventor

Kitamoto, Japan

Tatsuo Arai

This inventor holds 54 USPTO granted patents, primarily in Cutting Tools (CPC class 407 ). Top assignees: Mitsubishi Materials Corporation, Mitsubishi Kinzoku Kabushiki Kaisha, Mitsubishi Metal Corporation. Active years: 1985-2007.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tatsuo Arai. Retrieved from https://idiyas.com/inventor/tatsuo-arai

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

Calculating rank
USPTO Granted Patents = 54

% Patents Active = 98.1

Average Co-Inventor Count = 2.4

ph-index = 20

Forward Citations = 2,443(Granted Patents)

Forward Citations (Not Self Cited) = 2,403(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Yatabemachi, JP (1987)
  • Shinagawa, JP (1989)
  • Kitamoto, JP (1985 - 1991)
  • Tokyo, JP (1987 - 1993)
  • Ibaraki, JP (1992 - 1994)
  • Yuuki, JP (1994)
  • Ibaragi, JP (1995)
  • Ibaragi-ken, JP (1996 - 1999)
  • Ibaraki-ken, JP (1996 - 1999)
  • Yuuki-gun, JP (1998 - 2001)
  • Fussa, JP (2001 - 2007)

Company Filing History:

goldMedal26 out of 1,556 
 
Mitsubishi Materials Corporation
 patents
silverMedal17 out of 197 
 
Mitsubishi Kinzoku Kabushiki Kaisha
 patents
bronzeMedal5 out of 68 
 
Mitsubishi Metal Corporation
 patents
4. 4 out of 5,234 
 
Casio Computer Co., Ltd.
 patents
5. 2 out of 172 
 
Agency of Industrial Science and Technology Ministry of International
 patents
6. 1 out of 2 
 
Izumo Industrial Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1985-2007

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Areas of Expertise:
Cutting Tool
Milling Cutter
Rotary Cutter
Cutting Insert
Disposable Cutting Tip
End Mill
Face Milling Cutter
Insert Cutter
Nitrided Cutter
Active Gravity Compensation
Throwaway Milling Cutter
Indexable Cutter Insert
54 patents (USPTO):Explore Patents
1. 7227978 - Image input device (2007-06-05),
2. 6642959 - Electronic camera having picture data output function (2003-11-04),
3. 6287058 - Cutting tool and method for supplying cutting medium to the same (2001-09-11),
4. 6256688 - Interface apparatus operable by using floppy disk drive (2001-07-03),
5. 5984598 - Rotary cutter having chip-repelling mechanism (1999-11-16),
6. 5947649 - Reusable type end mill (1999-09-07),
7. 5855457 - Disposable cutting tip clamp for a milling machine (1999-01-05),
8. 5807031 - Throw-away tip and throw-away type cutter (1998-09-15),
9. 5791831 - Cutting insert (1998-08-11),
10. 5762453 - Cutting insert and method of manufacturing the cutting insert (1998-06-09),
11. 5586845 - Face milling cutting insert having convex rakes with obtusely (1996-12-24),
12. 5526716 - Method for manufacturing a cutter (1996-06-18),
13. 5460464 - Cutting insert (1995-10-24),
14. 5443335 - Cutting insert (1995-08-22),
15. 5352067 - Milling cutter clamping wedge with hardened chip surface (1994-10-04),

Title: Innovations and Impact of Tatsuo Arai in the Field of Patents

Introduction

Tatsuo Arai, located in Kitamoto, Japan, is a prolific inventor with a remarkable portfolio of 54 patents to his name. His contributions span various technological domains, demonstrating a strong commitment to innovation and advancement in the industry.

Latest Patents

Among his notable inventions is an Image Input Device, which features a rotating roller that includes a line image sensor and a Selfoc lens array, allowing for the creation of a two-dimensional optical image of a finger pressed against its surface. This innovative design enhances the capability of digitizing physical interactions. Another significant invention is an Electronic Camera with Picture Data Output Function, which enables a digital camera to store captured images and associated email address data. This innovation facilitates the transfer of photo data to personal computers, demonstrating Arai's prowess in integrating imaging technology with communication.

Career Highlights

Tatsuo Arai has had a distinguished career, working with prominent companies such as Mitsubishi Materials Corporation and Mitsubishi Kinzoku Kabushiki Kaisha. His tenure at these organizations has not only honed his skills as an inventor but also allowed him to contribute significantly to the development of advanced technologies.

Collaborations

Throughout his career, Arai has collaborated with notable colleagues, including Takayoshi Saito and Osamu Tsujimura. These partnerships have enabled the exchange of ideas and facilitated the development of groundbreaking inventions, further enriching the technological landscape.

Conclusion

Tatsuo Arai's extensive work and innovative inventions underscore his commitment to advancing technology in the field. With a strong patent portfolio and a collaborative spirit, he continues to influence the industry and inspire future generations of inventors. His contributions are a testament to the importance of innovation in driving progress and enhancing everyday life.

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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