Patents by Inventor Jun Fuziwara

Jun Fuziwara 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).

  • Apparatus and method for determining parameters of formations surrounding a borehole in a preselected direction
    Patent number: 5508616
    Abstract: At least one transmitting coil 1 and at least one receiving coil 2 are disposed along the bore axis 18 of a borehole 7 such that these coils are inclined and face each other, thus causing these coils to have directivity for examining electric characteristics of a formation around the borehole. More specifically, a method of and an apparatus for directional induction logging are provided, which permit measurement of the electric conductivity distribution of a formation in the circumferential direction in a range of several meters around the borehole and also imaging reflecting the electric conductivity.
    Type: Grant
    Filed: November 20, 1993
    Date of Patent: April 16, 1996
    Assignees: Sekiyushigen Kaihatsu Kabushiki Kaisha, Japan as Represented By President of Tohoku University
    Inventors: Motoyuki Sato, Hiroaki Niitsuma, Jun Fuziwara, Makoto Miyairi