Osaka, Japan

Makoto Hirotani

This inventor holds 1 USPTO granted patent. Top assignee: Sakura Color Products Corporation. Active years: 2007.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Makoto Hirotani. Retrieved from https://idiyas.com/inventor/makoto-hirotani

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


Average Co-Inventor Count = 4.0

ph-index = 1

Forward Citations = 10(Granted Patents)


Company Filing History:


Years Active: 2007

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1 patent (USPTO):Explore Patents

Title: Makoto Hirotani: Innovator in Ink Technology

Introduction

Makoto Hirotani is a notable inventor based in Osaka, Japan. He has made significant contributions to the field of ink technology, particularly in the development of water-based ink compositions. His innovative approach has led to advancements in marking pen design and functionality.

Latest Patents

Hirotani holds a patent for a "Water-based pigment-containing ink composition for central core type marking pen." This invention features a central core type marking pen that includes an ink storage portion and a pen tip. The ink composition contains a thickening agent and is designed to exhibit specific viscosity characteristics at 20°C, ensuring optimal performance during use.

Career Highlights

Hirotani is associated with Sakura Color Products Corporation, a company renowned for its high-quality art supplies and writing instruments. His work has contributed to the company's reputation for innovation in the stationery industry.

Collaborations

Hirotani has collaborated with notable colleagues, including Hidetoshi Fukuo and Naoshi Murata. Their combined expertise has fostered a creative environment that encourages the development of cutting-edge products.

Conclusion

Makoto Hirotani's contributions to ink technology exemplify the spirit of innovation in the industry. His patent for a water-based ink composition showcases his commitment to enhancing the functionality of marking pens.

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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