Patents by Inventor Nobuo Ii

Nobuo Ii 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).

  • Iron-doped lithium niobate single crystal, method for heat treatment thereof and hologram-application element containing the single crystal
    Patent number: 5904912
    Abstract: An iron-doped lithium niobate single crystal having a molar fraction of Li.sub.2 O/(Nb.sub.2 O.sub.5 +Li.sub.2 O) of from 0.495 to 0.50 which is closer to the stoichiometrical composition than a usual congruent composition, and a high diffraction efficiency by a two light wave mixture.
    Type: Grant
    Filed: January 2, 1997
    Date of Patent: May 18, 1999
    Assignee: National Institute for Research in Inorganic Materials
    Inventors: Kenji Kitamura, Yasunori Furukawa, Nobuo Ii, Shigeyuki Kimura
  • Process for producing single crystal of yttrium-iron garnet or solid solution thereof
    Patent number: 4256531
    Abstract: A single crystal of yttrium-iron garnet or solid solution comprising aluminum oxide component, gallium oxide component, iron oxide and/or the other rare earth oxide component is produced by a floating zone method.
    Type: Grant
    Filed: February 10, 1978
    Date of Patent: March 17, 1981
    Assignee: National Institute for Researches in Inorganic Materials
    Inventors: Shigeyuki Kimura, Isamu Shindo, Yasumichi Mori, Kenji Kitamura, Nobuo Ii