Nagoya, Japan

Nobuyuki Kitaoka

This inventor holds 3 USPTO granted patents and 2 EPO patents. Top assignee: The Pilot Ink Co., Ltd.. Active years: 2008-2013.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Nobuyuki Kitaoka. Retrieved from https://idiyas.com/inventor/nobuyuki-kitaoka

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

Calculating rank

% Patents Active = 66.7


Average Co-Inventor Count = 2.3

ph-index = 2

Forward Citations = 9(Granted Patents)


Location History:

  • Nagoya, JP (2008 - 2013)
  • Aichi, JP (2013)

Company Filing History:


Years Active: 2008-2013

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3 patents (USPTO):Explore Patents

Title: Nobuyuki Kitaoka: Innovator in Water-Based Writing Solutions

Introduction

Nobuyuki Kitaoka is a prominent inventor based in Nagoya, Japan. He has made significant contributions to the field of writing instruments, particularly focusing on water-based technologies. With a total of 3 patents, his innovations have enhanced the functionality and performance of ballpoint pens.

Latest Patents

Kitaoka's latest patents include a water-based ballpoint pen that utilizes a cemented carbide ball made of tungsten carbide and a metal binder. This innovative design incorporates cobalt and/or nickel in the binder, ensuring optimal performance. Another notable patent is a water-based ink composition for ballpoint pens, which guarantees a smooth writing experience without blurring. This composition is unique as it contains no water-soluble organic solvents and is primarily composed of water, along with a thickening inhibitor and shear thinning viscosity-imparting agents.

Career Highlights

Kitaoka is associated with The Pilot Ink Co., Ltd., a leading company in the writing instrument industry. His work has significantly contributed to the development of high-quality writing products that meet consumer needs. His expertise in water-based technologies has positioned him as a key player in the innovation of writing solutions.

Collaborations

Kitaoka has collaborated with notable coworkers such as Yoshiaki Ono and Hisashi Nakamura. Their combined efforts have led to advancements in the design and functionality of writing instruments.

Conclusion

Nobuyuki Kitaoka's contributions to the field of writing instruments, particularly through his innovative water-based technologies, have made a lasting impact. His patents reflect a commitment to enhancing the writing experience for users around the world.

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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