Kanagawa, Japan

Ryoji Ishii




Average Co-Inventor Count = 4.0

ph-index = 3

Forward Citations = 46(Granted Patents)


Location History:

  • Machida, JP (2003)
  • Ebina, JP (2009 - 2011)
  • Kanagawa, JP (2009 - 2012)
  • Tokyo, JP (2006 - 2022)

Company Filing History:


Years Active: 2003-2022

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12 patents (USPTO):

Title: The Innovative Mind of Ryoji Ishii: A Patented Vision in Optical and Material Science

Introduction: Ryoji Ishii, an accomplished inventor based in Kanagawa, Japan, has made significant contributions in the fields of optical devices and materials science. With a portfolio boasting 12 patents, he continues to push the boundaries of innovation, particularly in gas barrier films and optical transmission technologies.

Latest Patents: Among Ishii's noteworthy patents is a revolutionary gas barrier film which includes a film base material primarily composed of polyester resin with a butylene terephthalate unit. This innovative film integrates one or more metal oxide layers and exhibits a heat shrinkage rate in the machine direction (MD direction) between 0.6% and 3.0% after heating for 30 minutes at 150°C. The formula used to calculate this heat shrinkage rate is as follows: Heat shrinkage rate = {(Length before heating - Length after heating) / Length before heating} × 100 (%). Another significant patent is for an optical transmission apparatus that features an optical element with either a light emitting or light receiving part on its surface, coupled with a polymer material optical waveguide. This design cleverly includes an optical path deflecting part, ensuring efficient transmission and reception of light signals, further enhancing telecommunications and optical technologies.

Career Highlights: Ryoji Ishii has garnered valuable experience working with renowned companies such as Fuji Xerox Co., Ltd. and Toppan Printing Co., Ltd. His tenure at these organizations has allowed him to refine his skills and evolve his innovative ideas into tangible patents that benefit various industries.

Collaborations: Throughout his career, Ishii has collaborated with esteemed colleagues including Yasuaki Kuwata and Hideo Nakayama. These professional partnerships have fostered a dynamic exchange of ideas and contributed to the expansion of his inventive repertoire.

Conclusion: Ryoji Ishii stands as a prominent figure in the realms of optical and material sciences, showcasing a remarkable ability to innovate and create. With multiple patents under his belt, he continues to inspire future inventors and pave the way for advancements in technology, reaffirming the importance of creativity and collaboration in driving progress.

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