Patents by Inventor Hiroyuki Yamashina

Hiroyuki Yamashina 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).

  • Metal powder for electrically conductive paste and electrically conductive paste
    Patent number: 7618475
    Abstract: A metal powder for a conductive paste has an average particle diameter D50 not greater than 5 ?m and an X value defined by equation (1) not greater than 0.5: X value=D50 (?m)/BET specific surface area (m2/g)??(1) The metal powder for a conductive paste is particularly preferable when wart-like projections of a diameter not greater than 150 nm are present on the particle surfaces. Typical types of the metal powder include Cu, Ag, Au, Pd, Pt, Ni, Al and alloys thereof. The metal powder for a conductive paste enables fabrication of a conductor having a low void ratio after the paste is fired.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: November 17, 2009
    Assignee: Dowa Electronics Materials Co., Ltd.
    Inventors: Hiroyuki Yamashina, Hidefumi Fujita, Tatsuya Ibaraki
  • Metal powder for electrically conductive paste and electrically conductive paste
    Publication number: 20060179975
    Abstract: A metal powder for a conductive paste has an average particle diameter D50 not greater than 5 ?m and an X value defined by equation (1) not greater than 0.5: X value=D50 (?m)/BET specific surface area (m2/g) ??(1). The metal powder for a conductive paste is particularly preferable when wart-like projections of a diameter not greater than 150 nm are present on the particle surfaces. Typical types of the metal powder include Cu, Ag, Au, Pd, Pt, Ni, Al and alloys thereof. The metal powder for a conductive paste enables fabrication of a conductor having a low void ratio after the paste is fired.
    Type: Application
    Filed: January 27, 2006
    Publication date: August 17, 2006
    Inventors: Hiroyuki Yamashina, Hidefumi Fujita, Tatsuya Ibaraki
  • Touch panel for scanner with graphical user interface
    Patent number: D668259
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: October 2, 2012
    Assignee: PFU Limited
    Inventors: Kiichi Taniho, Hiroyuki Yamashina
  • Touch panel for scanner with graphical user interface
    Patent number: D668668
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: October 9, 2012
    Assignee: PFU Limited
    Inventors: Kiichi Taniho, Hiroyuki Yamashina
  • Touch panel for scanner with graphical user interface
    Patent number: D669089
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: October 16, 2012
    Assignee: PFU Limited
    Inventors: Kiichi Taniho, Hiroyuki Yamashina