Patents by Inventor Koki Mitsuno

Koki Mitsuno has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Plastic optical fiber, medical lighting device, medical sensor device, medical phototherapy device, and plastic optical fiber cord
    Patent number: 12449587
    Abstract: A plastic optical fiber that has a multilayer structure that includes a core (X), a first cladding (Y), and a second cladding (Z), wherein the core is made of an organic polymer material having a water-absorbing ratio of not less than 0.001% and not more than 0.29% and a total light transmittance of not less than 80% and containing not less than 0.01% by weight and not more than 10% by weight of a plasticizer; a relationship between a refractive index of the core (X) and the refractive index of the first cladding (Y) is defined by inequality: X?Y>0.01, and a relationship between a refractive index of the first cladding (Y) and the refractive index of a second cladding (Z) is defined by inequality: Y?Z>0.05, wherein the plastic optical fiber has high humidity resistance and excellent bending resistance.
    Type: Grant
    Filed: June 21, 2021
    Date of Patent: October 21, 2025
    Assignee: Toray Industries, Inc.
    Inventors: Koki Mitsuno, Satoshi Matsuba, Kenji Hiramoto
  • PLASTIC OPTICAL FIBER, MEDICAL LIGHTING DEVICE, MEDICAL SENSOR DEVICE, MEDICAL PHOTOTHERAPY DEVICE, AND PLASTIC OPTICAL FIBER CORD
    Publication number: 20240255693
    Abstract: A plastic optical fiber that has a multilayer structure that includes a core (X), a first cladding (Y), and a second cladding (Z), wherein the core is made of an organic polymer material having a water-absorbing ratio of not less than 0.001% and not more than 0.29% and a total light transmittance of not less than 80% and containing not less than 0.01% by weight and not more than 10% by weight of a plasticizer; a relationship between a refractive index of the core (X) and the refractive index of the first cladding (Y) is defined by inequality: X?Y>0.01, and a relationship between a refractive index of the first cladding (Y) and the refractive index of a second cladding (Z) is defined by inequality: Y?Z>0.05, wherein the plastic optical fiber has high humidity resistance and excellent bending resistance.
    Type: Application
    Filed: June 21, 2021
    Publication date: August 1, 2024
    Inventors: Koki Mitsuno, Satoshi Matsuba, Kenji Hiramoto