This inventor holds 6 USPTO granted patents and 7 published patent applications, plus 1 CIPO patent and 3 EPO patents. Top assignee: Mitsubishi Pencil Company, Limited. Active years: 2019-2025.
Location History:
- Yokohama, JP (2019)
- Tokyo, JP (2023 - 2024)
Company Filing History:
Years Active: 2019-2025
Title: Hisato Haga: Innovator in Writing Instrument Technology
Introduction
Hisato Haga is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of writing instruments, holding a total of 6 patents. His innovative work focuses on improving the performance and quality of aqueous ink compositions used in writing tools.
Latest Patents
One of Hisato Haga's latest patents is an aqueous ink composition for writing instruments. This composition contains an aqueous dispersion of colored resin fine particles, which include a cyclohexyl (meth)acrylate monomer and a basic or oil-soluble dye. The formulation ensures that the cyclohexyl (meth)acrylate monomer is present in an amount of 30 mass % or greater relative to the polymerizable polymer component. Additionally, the colored resin fine particles incorporate a terpene phenol resin for enhanced performance. Another notable patent is for a writing instrument designed to prevent dye deposition to the pen core. This instrument achieves both inhibition of ink discoloration and improved writing feel without compromising writing performance. It utilizes a water-based ink composition containing colored resin particles formed by polymerization of a monomer that includes cyclohexyl (meth)acrylate, along with an anionic surfactant.
Career Highlights
Hisato Haga is currently employed at Mitsubishi Pencil Company, Limited, where he continues to innovate in the field of writing instruments. His work has significantly impacted the design and functionality of modern writing tools, making them more efficient and user-friendly.
Collaborations
Hisato has collaborated with notable coworkers, including Yusuke Nakata and Tetsuji Murase, contributing to the advancement of writing instrument technology.
Conclusion
Hisato Haga's contributions to the field of writing instruments exemplify his dedication to innovation and quality. His patents reflect a commitment to enhancing the user experience through advanced ink compositions and writing instrument designs.