Patents by Inventor Yoshiki Higashiyama

Yoshiki Higashiyama 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).

  • Glass for molded lens
    Patent number: 6806217
    Abstract: A mold lens glass including B2O3, SiO2, La2O3, ZnO, BaO, and CaO, wherein the components in the composition are present in a weight ratio: of B2O3 (25% to 35% by weight), SiO2 (1% to 7% by weight), wherein the total amount of B2O3 and SiO2 is 30% to 40% by weight. La2O3 is present in an amount of 12% to 20% by weight, and the total amount of ZnO, BaO and CaO is 40% to 55% by weight. By using the mold lens glass of the present invention, it is possible to obtain a mold lens glass having a high refractive index, excellent water resistance, and a stable glassy state.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: October 19, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shigeo Furukawa, Masahiro Hiraka, Shigeki Yamada, Yoshiki Higashiyama
  • Rake synthesizing circuit and rake synthesizing method
    Publication number: 20030158027
    Abstract: Mold lens glass including B2O3, SiO2, La2O3, ZnO, BaO, and CaO, wherein a composition in weight ratio is: B2O3 is 25% to 35% by weight, SiO2 is 1% to 7% by weight, where a total amount of B2O3 and SiO2 is 30% to 40% by weight. A content of La2O3 is 12% to 20% by weight, and a total amount of ZnO, BaO and CaO is 40% to 55% by weight. By using the mold lens glass of the present invention, it is possible to obtain mold lens glass having high refractive index, excellent water resistance and a stable glassy state.
    Type: Application
    Filed: March 7, 2003
    Publication date: August 21, 2003
    Inventors: Shigeo Furukawa, Masahiro Hiraka, Shigeki Yamada, Yoshiki Higashiyama