Kawagoe, Japan

Toshihiko Kageyama

This inventor holds 10 USPTO granted patents. Top assignees: Kotobuki Co., Ltd., Kabushiki Kaisha Kotobuki. Active years: 1980-2004.

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

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


% Patents Active = 90.0

Average Co-Inventor Count = 2.9

ph-index = 6

Forward Citations = 97(Granted Patents)


Location History:

  • Kawagoeshi, JP (1991 - 1994)
  • Saitama-ken, JP (1997)
  • Kawagoe, JP (1980 - 2004)

Company Filing History:


Years Active: 1980-2004

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10 patents (USPTO):Explore Patents

Title: Innovations of Toshihiko Kageyama

Introduction

Toshihiko Kageyama is a notable inventor based in Kawagoe, Japan. He has made significant contributions to the field of inventions, holding a total of 10 patents. His work showcases a blend of practicality and innovative design, particularly in the areas of clip structures and writing tools.

Latest Patents

One of Kageyama's latest patents is a clip attaching structure. This invention focuses on reducing costs while enhancing appearance and spring action. The clip is crafted from a thin plate metal material, featuring a base part designed to be inserted into an outer sleeve and a main body part that extends outside the sleeve. The main body part has an approximately U-shaped cross-section, achieved by bending both sides of the thin plate downward. Additionally, a closing part is included to seal the rear end opening of the inner sleeve. The design ensures that the clip remains functional and aesthetically pleasing.

Another significant invention by Kageyama is a writing tool, which can be a mechanical pencil or a ballpoint pen. This tool incorporates a writing shaft with a head member that projects from an outer sleeve. The design includes a stair or step and a spiral groove on the inner surfaces of a tubular cap, allowing for smooth operation. The writing tool is engineered for ease of use, with a bearing part that interacts with a lead tank, ensuring that the outer sleeve can move axially while being locked in the turning direction.

Career Highlights

Throughout his career, Toshihiko Kageyama has worked with several companies, including Kotobuki Co., Ltd. and Kabushiki Kaisha Kotobuki. His experience in these organizations has contributed to his development as an inventor and has allowed him to refine his innovative ideas.

Collaborations

Kageyama has collaborated with notable coworkers such as Youichi Nakazato and Yoshihide Mitsuya. Their teamwork has likely fostered a creative environment that encourages the development of new inventions.

Conclusion

Toshihiko Kageyama's contributions to the field of inventions are marked by his innovative designs and practical applications. His patents reflect a commitment to enhancing everyday tools, making them more efficient and user-friendly. His work continues to inspire future inventors in the industry.

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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