Patents by Inventor Mithuru Sakuma

Mithuru Sakuma 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).

  • Package structure for optical element and fibers and composite structure thereof
    Patent number: 5727105
    Abstract: An optical element-optical fiber composite structure having a high resistance of the optical fiber to breakage due to cyclical change in temperature, includes a package structure having a main container, side containers attached to the main container and sleeves through which a main chamber of the main container is connected to side chambers of the side containers; an optical element housed in the main chamber; and optical fibers introduced into the main chamber through the side chambers and the sleeves and connected to the optical element.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: March 10, 1998
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Hirotoshi Nagata, Masaru Shiroishi, Tsutomu Saito, Takashi Tateyama, Mithuru Sakuma
  • Package structure for optical element and fibers and composite structure thereof
    Patent number: 5613026
    Abstract: An optical element-optical fiber composite structure having a high resistance of the optical fiber to breakage due to cyclical change in temperature, includes a package structure having a main container, side containers attached to the main container and sleeves through which a main chamber of the main container is connected to side chambers of the side containers; an optical element housed in the main chamber; and optical fibers introduced into the main chamber through the side chambers and the sleeves and connected to the optical element.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: March 18, 1997
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Hirotoshi Nagata, Masaru Shiroishi, Tsutomu Saito, Takashi Tateyama, Mithuru Sakuma, Naoki Kougo, Susumu Murata, Ryosuke Kaizu, Nobuhide Miyamoto