Patents by Inventor Hiroki Kishiku

Hiroki Kishiku 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).

  • Key sheet, lightproof light guiding sheet, pushbutton switch, and method of manufacturing key sheet
    Patent number: 8827528
    Abstract: The present invention provides technology that can efficiently guide light to the interior of a key sheet and prevents light from leaking from the circumferences of key tops. A key sheet has a light-shielding dark print layer, on the rear surface of a base sheet, that is a cured body of a coating liquid that is not dissolve to the surface of the base sheet, and also has a smooth surface between the base sheet and the dark print layer. The invention can make light transmitting in the base sheet hard to enter the dark print layer so that the light can be efficiently guided in the base sheet, and also can prevent light from transmitting through the base sheet by blocking the light.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: September 9, 2014
    Assignee: Polymatech Co., Ltd.
    Inventors: Yasunori Takeda, Hiroki Kishiku
  • KEY SHEET, LIGHTPROOF LIGHT GUIDING SHEET, PUSHBUTTON SWITCH, AND METHOD OF MANUFACTURING KEY SHEET
    Publication number: 20110278145
    Abstract: The present invention provides technology that can efficiently guide light to the interior of a key sheet and prevents light from leaking from the circumferences of key tops. A key sheet has a light-shielding dark print layer, on the rear surface of a base sheet, that is a cured body of a coating liquid that is not dissolve to the surface of the base sheet, and also has a smooth surface between the base sheet and the dark print layer. The invention can make light transmitting in the base sheet hard to enter the dark print layer so that the light can be efficiently guided in the base sheet, and also can prevent light from transmitting through the base sheet by blocking the light.
    Type: Application
    Filed: September 15, 2009
    Publication date: November 17, 2011
    Inventors: Yasunori Takeda, Hiroki Kishiku