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For the Inventor, By the Inventor

Kawagoe, Japan

Tomiji Ueki

This inventor holds 11 USPTO granted patents. Top assignee: Kotobuki Co., Ltd.. Active years: 1996-2001.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tomiji Ueki. Retrieved from https://idiyas.com/inventor/tomiji-ueki

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

Calculating rank
USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 2.6

ph-index = 3

Forward Citations = 43(Granted Patents)


Location History:

  • Saitama-ken, JP (1998)
  • Kawagoe, JP (1996 - 2001)

Company Filing History:

goldMedal11 out of 294 
 
Kotobuki Co., Ltd.
 patents

Years Active: 1996-2001

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11 patents (USPTO):Explore Patents
1. 6224282 - Side knock-type ball point pen (2001-05-01),
2. 6210058 - Side knock type mechanical pencil (2001-04-03),
3. 6099182 - Side knock-type mechanical pencil (2000-08-08),
4. 5971644 - Side knock-type writing instrument (1999-10-26),
5. 5846009 - Writing tool (1998-12-08),
6. 5836707 - Side knock type mechanical pencil (1998-11-17),
7. 5791797 - Side knock type mechanical pencil (1998-08-11),
8. 5788118 - Lead dispensing storage container (1998-08-04),
9. 5720643 - Lead dispensing storage container (1998-02-24),
10. 5702193 - Side knock type mechanical pencil (1997-12-30),
11. 5480249 - Lead dispensing storage container (1996-01-02),

Title: The Innovative Mind of Tomiji Ueki

Introduction

Tomiji Ueki is a prominent inventor based in Kawagoe, Japan. He has made significant contributions to the field of writing instruments, holding a total of 11 patents. His innovative designs have transformed everyday writing tools into more efficient and user-friendly devices.

Latest Patents

Among his latest inventions is the side knock-type ballpoint pen. This pen features a barrel with a front and rear end, a refill-receiver member that is axially movable, and a refill that includes an ink container-tube and a writing tip. The design incorporates mechanisms to prevent the refill-receiver from rotating and to keep the writing tip projected during use. Another notable invention is the side knock-type mechanical pencil. This pencil includes a cylindrical shell, a slide member, and a chuck that works in conjunction with a side knock mechanism, allowing for easy advancement of the writing tip.

Career Highlights

Tomiji Ueki has dedicated his career to enhancing the functionality and design of writing instruments. His work at Kotobuki & Co., Ltd. has allowed him to explore various innovative concepts and bring them to fruition. His patents reflect a deep understanding of user needs and mechanical design.

Collaborations

Throughout his career, Ueki has collaborated with talented individuals such as Yoshihide Mitsuya and Hidehei Kageyama. These partnerships have fostered a creative environment that encourages the development of groundbreaking inventions.

Conclusion

Tomiji Ueki's contributions to the field of writing instruments exemplify the spirit of innovation. His patents not only enhance the functionality of everyday tools but also demonstrate his commitment to improving user experience.

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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