Patents Assigned to SEI Optrifrontier Co., Ltd.
  • Patent number: D709286
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: July 22, 2014
    Assignee: SEI Optrifrontier Co., Ltd.
    Inventors: Hiroshi Takayanagi, Teruaki Nishida, Hisao Yui, Hiroyasu Toyooka