Patents by Inventor Teiichi Hanada

Teiichi Hanada 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).

  • Light-amplifying glass, light-amplifying medium and resin-coated light-amplifying medium
    Patent number: 6620748
    Abstract: An optical amplifying glass comprising a matrix glass and, added thereto, from 0.01 to 10 wt % of Er, characterized in that said matrix glass substantially comprises, as represented by mol %, 20 to 80 of Bi2O3, 0 to 74.89 of B2O3, 0 to 79.99 of SiO2, 0.01 to 10 of CeO2, 0 to 50 of Li2O, 0 to 50 of TiO2, 0 to 50 of ZrO2, 0 to 50 of SnO2, 0 to 30 of WO3, 0 to 30 of TeO2, 0 to 30 of Ga2O3 and 0 to 10 of Al2O3, with the proviso that said matrix glass contains at least one of B2O3 and SiO2.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: September 16, 2003
    Inventors: Naoki Sugimoto, Yutaka Kuroiwa, Setsuro Ito, Setsuhisa Tanabe, Teiichi Hanada