Patents by Inventor Kouichi Miyagi

Kouichi Miyagi 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).

  • Polarization conversion element, polarization-conversion-element manufacturing method, light-source unit, and optical device
    Patent number: 10042176
    Abstract: This invention provides a polarization conversion element that is highly resistant to the heat and light that result from increased brightness levels. In said polarization conversion element, inorganic half-wave plates provided selectively on the output surface of a polarizing beam-splitter array have obliquely deposited layers comprising a dielectric material and the side surfaces of said obliquely deposited layers are covered by protective films.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: August 7, 2018
    Assignee: DEXERIALS CORPORATION
    Inventors: Koji Sasaki, Masatoshi Sasaki, Nobuyuki Koike, Akio Takada, Katsuhiro Shindo, Toshiaki Sugawara, Kouichi Miyagi, Masahiro Oowada
  • POLARIZATION CONVERSION ELEMENT, POLARIZATION-CONVERSION-ELEMENT MANUFACTURING METHOD, LIGHT-SOURCE UNIT, AND OPTICAL DEVICE
    Publication number: 20160097936
    Abstract: This invention provides a polarization conversion element that is highly resistant to the heat and light that result from increased brightness levels. In said polarization conversion element, inorganic half-wave plates provided selectively on the output surface of a polarizing beam-splitter array have obliquely deposited layers comprising a dielectric material and the side surfaces of said obliquely deposited layers are covered by protective films.
    Type: Application
    Filed: June 27, 2014
    Publication date: April 7, 2016
    Applicant: DEXERIALS CORPORATION
    Inventors: Koji SASAKI, Masatoshi SASAKI, Nobuyuki KOIKE, Akio TAKADA, Katsuhiro SHINDO, Toshiaki SUGAWARA, Kouichi MIYAGI, Masahiro OOWADA
  • Power supply device for hand with luminescence element
    Patent number: 4995022
    Abstract: A power supply device for a hand with a luminescence element which is adapted to supply electric power to the luminescence element mounted on the hand.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: February 19, 1991
    Assignee: Seikosha Co., Ltd.
    Inventors: Hidetsugu Ikeda, Shoichiro Kumazawa, Satoru Yamauchi, Isato Watanabe, Kouichi Miyagi