Patents by Inventor Tomoharu Sagawa

Tomoharu Sagawa 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).

  • Mounting board and method of producing the same
    Patent number: 8039760
    Abstract: A mounting board of the invention includes: an insulative base; a plurality of first conductive elements provided on the insulative base and having lands; a plurality of second conductive elements disposed on the lands; a plurality of solder pieces each disposed on each of the second conductive elements; and an electronic component which includes electrode sections each contacting each of the solder pieces, wherein the first conductive elements are made from a first element that contains at least silver; the second conductive elements are made from a second element that contains at least copper; and the solder pieces are made from a third element that contains at least tin.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: October 18, 2011
    Assignee: Fujikura Ltd.
    Inventors: Tomoharu Sagawa, Atsushi Kume
  • MOUNTING BOARD AND METHOD OF PRODUCING THE SAME
    Publication number: 20100258341
    Abstract: A mounting board of the invention includes: an insulative base; a plurality of first conductive elements provided on the insulative base and having lands; a plurality of second conductive elements disposed on the lands; a plurality of solder pieces each disposed on each of the second conductive elements; and an electronic component which includes electrode sections each contacting each of the solder pieces, wherein the first conductive elements are made from a first element that contains at least silver; the second conductive elements are made from a second element that contains at least copper; and the solder pieces are made from a third element that contains at least tin.
    Type: Application
    Filed: June 24, 2010
    Publication date: October 14, 2010
    Applicant: Fujikura Ltd.
    Inventors: Tomoharu SAGAWA, Atsushi Kume
  • Optical fiber polarization mode dispersion measurement method and measurement device
    Patent number: 7212281
    Abstract: A method of measuring polarization mode dispersion of an optical fiber includes inputting linearly polarized pulse light into an optical fiber, separating the input linearly polarized light from backscattered light from the optical fiber, detecting a light intensity of the backscattered light as time series data since the generation of the pulse light, calculating a fluctuation of the detected light intensity in the time series data, and evaluating polarization mode dispersion in the optical fiber, based on the calculated fluctuation value.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: May 1, 2007
    Assignee: Fujikura, Ltd.
    Inventors: Shoji Tanigawa, Tomoharu Sagawa, Masataka Ikeda, Shoichiro Matsuo, Kuniharu Himeno, Koichi Harada
  • Optical fiber polarization mode dispersion measurement method and measurement device
    Publication number: 20050259241
    Abstract: A method of measuring polarization mode dispersion of an optical fiber includes inputting linearly polarized pulse light into an optical fiber, separating the input linearly polarized light from backscattered light from the optical fiber, detecting a light intensity of the backscattered light as time series data since the generation of the pulse light, calculating a fluctuation of the detected light intensity in the time series data, and evaluating polarization mode dispersion in the optical fiber, based on the calculated fluctuation value.
    Type: Application
    Filed: July 18, 2003
    Publication date: November 24, 2005
    Inventors: Shoji Tanigawa, Tomoharu Sagawa, Masataka Ikeda, Shoichiro Matsuo, Kuniharu Himeno, Koichi Harada