Patents by Inventor Hirotoshi Ohta

Hirotoshi Ohta 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).

  • Light guide sheet and electronic equipment utilizing the same
    Patent number: 8177409
    Abstract: A light guide sheet of the present invention includes a silicone rubber sheet 1 and plural printed mark parts 3a to 3d printed on the front surface of the silicone rubber sheet 1. The silicone rubber sheet 1 has a visible light transmittance of 80 to 99% and is provided at an end face thereof with a light incidence portion 2a allowing light to be incident upon the interior of the silicone rubber sheet 1. The light guide sheet is capable of causing the light incident upon the interior of the silicone rubber sheet 1 from the light incidence portion 2a to be diffused by the printed mark parts 3a to 3d, and pass through the printed mark parts 3a to 3d, thereby guiding the light outside from the printed mark parts 3a to 3d.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: May 15, 2012
    Assignee: Fuji Polymer Industries Co., Ltd.
    Inventors: Hirotoshi Ohta, Kitaaki Ohmori
  • LIGHT GUIDE SHEET AND ELECTRONIC EQUIPMENT UTILIZING THE SAME
    Publication number: 20100067254
    Abstract: A light guide sheet of the present invention includes a silicone rubber sheet 1 and plural printed mark parts 3a to 3d printed on the front surface of the silicone rubber sheet 1. The silicone rubber sheet 1 has a visible light transmittance of 80 to 99% and is provided at an end face thereof with a light incidence portion 2a allowing light to be incident upon the interior of the silicone rubber sheet 1. The light guide sheet is capable of causing the light incident upon the interior of the silicone rubber sheet 1 from the light incidence portion 2a to be diffused by the printed mark parts 3a to 3d, and pass through the printed mark parts 3a to 3d, thereby guiding the light outside from the printed mark parts 3a to 3d.
    Type: Application
    Filed: November 15, 2007
    Publication date: March 18, 2010
    Applicant: FUJI POLYMER INDUSTRIES CO., LTD.
    Inventors: Hirotoshi Ohta, Kitaaki Ohmori