Patents by Inventor Shigetomo Nunomura

Shigetomo Nunomura 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).

  • Non-destructive inspection method
    Patent number: 4979394
    Abstract: The coherence between inputted and received white noise is used to determined the presence or absence of flaws in a structure such as a joint. The strength of the joint is determined by integrating the coherence factor and observing the magnitude of the same.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: December 25, 1990
    Assignees: Nissan Motor Co., Ltd., Tokyo Institute of Technology, Reasearch Laboratory of Precision Machinery and Electronics
    Inventors: Yakichi Higo, Shigetomo Nunomura, Toshio Takano, Junichiro Matsuoka, Tadashi Ashida
  • Functional evaluation device capable of evaluating an artificial device by the use of acoustic emission
    Patent number: 4819753
    Abstract: In a functional evaluation device for use in evaluating functional degradation of an artificial device buried in a living body, frequency zones of acoustic emission are detected by the use of the fact that the functional degradation brings about variation of the frequency zones. The acoustic emission may be measured at two different positions adjacent to the artificial device so as to detect an arrival time difference of the acoustic emission and to thereby locate the functional degradation. The acoustic emission is therefore picked up by a pair of transducers placed at the two positions and is processed by a processing circuit for detecting whether or not the functional degradation takes place and by a determining circuit for locating the functional degradation.
    Type: Grant
    Filed: November 13, 1986
    Date of Patent: April 11, 1989
    Assignee: Yakichi Higo
    Inventors: Yakichi Higo, Shigetomo Nunomura, Masashi Ono