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For the Inventor, By the Inventor

Tokyo, Japan

Takashi Ohno

This inventor holds 3 USPTO granted patents. Top assignee: Kabushiki Kaisha Pilot Corporation. Active years: 1999-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takashi Ohno. Retrieved from https://idiyas.com/inventor/takashi-ohno-81so6p49

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

USPTO Granted Patents = 3

% Patents Active = 100.0

Average Co-Inventor Count = 2.6

ph-index = 1

Forward Citations = 7(Granted Patents)


Location History:

  • Isezaki, JP (1999)
  • Isesaki, JP (2001)
  • Tokyo-to, JP (2020)

Company Filing History:

goldMedal3 out of 181 
 
Kabushiki Kaisha Pilot Corporation
 patents

Years Active: 1999-2020

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3 patents (USPTO):Explore Patents
1. 10711147 - Writing ink composition for aqueous ballpoint pen, ballpoint pen employing the same, and process for producing the writing ink composition for aqueous ballpoint pen (2020-07-14),
2. 6305865 - Push button type ballpoint pen (2001-10-23),
3. 5925175 - Direct filling ink capable of being used for a ballpoint pen containing (1999-07-20),

Title: Takashi Ohno: Innovator in Writing Ink Technology

Introduction

Takashi Ohno is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of writing instruments, particularly in the development of aqueous ink compositions for ballpoint pens. With a total of 3 patents to his name, Ohno's work has enhanced the functionality and performance of writing implements.

Latest Patents

Ohno's latest patents include a writing ink composition for aqueous ballpoint pens, a ballpoint pen employing the same, and a process for producing the writing ink composition. The innovative aqueous writing ink composition is designed to create handwriting that possesses both opacity and transparency. It consists of a white pigment, resin particles containing styrene-acrylonitrile, a colorant, and a polysaccharide. The specific proportions of these components are carefully formulated to meet certain conditions, ensuring optimal performance.

Additionally, his retractable ballpoint pen design addresses common issues such as ink leakage and back-flow. This pen features a ballpoint pen refill with a tip that is protected during retraction, ensuring a smooth writing experience. The water-based ink used in this pen contains a thixotropic agent, which contributes to its viscosity and overall writing quality.

Career Highlights

Ohno is currently associated with Kabushiki Kaisha Pilot Corporation, a leading company in the writing instrument industry. His work has been instrumental in advancing the technology behind ballpoint pens, making them more reliable and user-friendly.

Collaborations

Throughout his career, Ohno has collaborated with notable colleagues, including Kazuhiro Yoshii and Kazuhiko Sasaki. These partnerships have fostered innovation and creativity in the development of new writing technologies.

Conclusion

Takashi Ohno's contributions to the field of writing instruments have made a lasting impact on the industry. His innovative patents and dedication to improving writing technology continue to inspire future advancements.

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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