Mishima, Japan

Kyoji Tsutsui

This inventor holds 45 USPTO granted patents and 1 EPO patent, primarily in Reversible Thermosensitive Materials. Top assignees: Ricoh Company, Ltd., Miyoshi Yushi Kabushiki Kaisha, Richo Company, Ltd.. Active years: 1981-2009.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kyoji Tsutsui. Retrieved from https://idiyas.com/inventor/kyoji-tsutsui

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


% Patents Active = 93.3


Average Co-Inventor Count = 3.6

ph-index = 14

Forward Citations = 556(Granted Patents)


Location History:

  • Tokyo, JP (1981 - 1982)
  • Numazu, JP (1982)
  • Shizuoka-ken, JP (1999 - 2003)
  • Mishima, JP (1985 - 2009)

Company Filing History:


Years Active: 1981-2009

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Areas of Expertise:
Reversible Thermosensitive Recording
Thermal Recording Method
Electrophotographic Printing
Color Forming Composition
Optically Anisotropic Medium
Information Recording System
Erasable Recording Material
Functional Element Manifestation
Disazo Compounds
Hydrazone Compounds
Photoconductor
Recording Medium
45 patents (USPTO):Explore Patents

Title: Kyoji Tsutsui: A Pioneer in Reversible Thermosensitive Recording Technologies

Introduction

Kyoji Tsutsui, an inventor based in Mishima, Japan, is renowned for his significant contributions to the field of thermosensitive recording technologies. With an impressive portfolio of 45 patents, Tsutsui has been instrumental in developing innovative materials and methods that enhance the capabilities of recording media. His work has laid the groundwork for advancements in imaging and data storage.

Latest Patents

Among Tsutsui's latest patents are several innovations that focus on phenol compounds and reversible thermosensitive recording mediums. These inventions, which include a thermosensitive recording medium, recording label, and recording member, feature a unique thermosensitive recording layer comprised of electron-donating coloring compounds and electron-accepting compounds. The recording layer is designed to change between developed and erased conditions based on differences in heating temperatures and cooling rates. Notably, his work emphasizes the use of phenol compounds, following General Formula (1), to achieve these reversible properties.

Career Highlights

Throughout his career, Kyoji Tsutsui has collaborated with prominent companies such as Ricoh Company, Ltd. and Miyoshi Yushi Kabushiki Kaisha. His tenure at these institutions has allowed him to refine his innovative concepts and contribute valuable insights into thermosensitive technologies. His patents reflect his dedication to advancing the industry and improving the functionality of recording materials.

Collaborations

Tsutsui has worked alongside talented colleagues, including Hiromi Furuya and Masaru Shimada. Together, they have pursued groundbreaking research, fostering collaborative efforts that have pushed the boundaries of technology in their field. These partnerships have not only led to innovative solutions but have also strengthened the research community's impact on industrial applications.

Conclusion

Kyoji Tsutsui's numerous patents and contributions to reversible thermosensitive recording technologies highlight his status as a significant figure in the realm of innovation. His commitment to advancing material science and imaging techniques continues to influence the industry, paving the way for future developments. As technology evolves, Tsutsui's pioneering work serves as a foundation for ongoing research and innovation in thermosensitive recording mediums.

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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