Location History:
- Kyoto, JP (1984 - 1990)
- Uji, JP (1993 - 1994)
Company Filing History:
12 out of 16 
1 out of 3 Years Active: 1984-1994
Title: **The Innovative Contributions of Katsuhiko Tsunemitsu**
Introduction
Katsuhiko Tsunemitsu is a notable inventor based in Kyoto, Japan, recognized for his contributions to the field of materials science and recording technology. With a portfolio of 12 patents, his work has significantly impacted the development of innovative recording materials.
Latest Patents
Among Tsunemitsu's latest inventions are two remarkable patents. The first is centered around a phthalide compound and its use as a recording material. This novel compound forms a distinctive blue-black color rapidly when combined with a developer. The color image produced exhibits strong absorption at wavelengths between 700 to 750 nm, facilitating its application in optical character reading systems. The formula includes various chemical groups, enhancing its versatility and effectiveness.
The second significant patent pertains to a thermosensitive recording material containing a durene derivative. This invention allows for the development of a recording layer that reacts with a leuco dye and a color-developing agent, yielding high color sensitivity upon heating. The innovative approach enables the creation of more responsive and efficient thermosensitive materials.
Career Highlights
Katsuhiko Tsunemitsu has worked with prominent companies such as Yamada Chemical Co., Ltd. and Nagase Chemicals Ltd., where he applied his expertise in chemical engineering and materials science to develop advanced recording materials. His contributions in these roles have led to numerous innovations that further enhance the efficiency and functionality of recording technologies.
Collaborations
Throughout his career, Tsunemitsu has collaborated with esteemed colleagues, including Hajime Kawai and Yoshiharu Fujino. Their combined efforts have fostered a collaborative environment that promotes innovation and discovery, resulting in significant advancements in recording materials.
Conclusion
Katsuhiko Tsunemitsu's innovative spirit and dedication to research have led to valuable contributions within the fields of materials science and recording technology. His patents not only reflect his creative capabilities but also serve as a foundation for future advancements in the industry. The impact of his work continues to resonate, influencing the evolution of recording materials and methodologies.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.