Shuhei Kageyama

This inventor holds 28 USPTO granted patents, primarily in Writing Instruments. Top assignees: Kotobuki Co., Ltd., The Gillette Company. Active years: 1989-2000.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shuhei Kageyama. Retrieved from https://idiyas.com/inventor/shuhei-kageyama

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

USPTO Granted Patents = 28

% Patents Active = 100.0

Average Co-Inventor Count = 2.3

ph-index = 9

Forward Citations = 218(Granted Patents)

Location History:

Kawagoeshi, JP (1989 - 1993)
Saitama-ken, JP (1997 - 1998)
Kawagoe, JP (1990 - 2000)

Company Filing History:

Years Active: 1989-2000

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Areas of Expertise:

Writing Utensil

Mechanical Pencil

Lead Dispenser

Rotary-Cam Pen

Eraser Dispenser

Retractable Tool

Clip Mechanism

Storage Container

Advancement Mechanism

Stick-Shaped Material

Twin-Type Container

Swing-Type Pencil

28 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6126350 - Writing utensil (2000-10-03),

2. 5961237 - Writing instrument (1999-10-05),

3. 5961236 - Dispenser for selectively extending and retracting a substantially (1999-10-05),

4. 5927882 - Dispenser for selectively extending and retracting a substantially (1999-07-27),

5. 5826999 - Mechanical pencil (1998-10-27),

6. 5810496 - Writing instrument (1998-09-22),

7. 5788118 - Lead dispensing storage container (1998-08-04),

8. 5720643 - Lead dispensing storage container (1998-02-24),

9. 5700101 - Writing tool (1997-12-23),

10. 5683191 - Writing tool (1997-11-04),

11. 5549404 - Stick-shaped material drive container and supply cassette (1996-08-27),

12. 5547301 - Writing instrument with rotatable advancement and retraction (1996-08-20),

13. 5480249 - Lead dispensing storage container (1996-01-02),

14. 5413428 - Writing instrument (1995-05-09),

15. 5362166 - Flat stick-shaped material propelling container (1994-11-08),

Title: Shuhei Kageyama: Innovator in Writing Instruments

Introduction

Shuhei Kageyama, a prominent inventor based in Kawagoe, Japan, is widely recognized for his significant contributions to the field of writing instruments. With a remarkable portfolio of 28 patents, Kageyama has developed innovative solutions that enhance the functionality and usability of writing tools.

Latest Patents

Among his latest inventions is a writing utensil designed for easy assembly without damaging its outer appearance. This innovative writing instrument includes a lead advancing mechanism featuring a chuck connected to a front tank member, along with a unique resilient engaging means that smoothly integrates into its structure. Additionally, Kageyama has developed a dispenser designed for selectively extending and retracting stick-shaped objects, which comprises an outer tubular casing with dual chambers that facilitate seamless operation. This design also incorporates a retaining mechanism to securely hold the dispenser structure in place, showcasing Kageyama's ingenuity in enhancing the user experience in everyday writing tasks.

Career Highlights

Shuhei Kageyama's career includes significant tenures at Kotobuki & Co., Ltd., where he has played a vital role in advancing the company's product offerings. His inventive approach and understanding of consumer needs have positioned him as a valuable asset in the field of writing instrument design.

Collaborations

Throughout his career, Kageyama has collaborated with fellow inventors, including Yoshihide Mitsuya and Youichi Nakazato. These collaborations have enriched his creative process, resulting in a number of innovative patents that continue to impact the writing instrument industry.

Conclusion

Shuhei Kageyama's dedication to innovation has made a lasting impression on the realm of writing instruments. With a portfolio that reflects his inventive spirit and a career marked by collaboration and advancement, Kageyama remains an influential figure, shaping the future of writing technology.

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]