Patents by Inventor Junichi Amakatsu

Junichi Amakatsu 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).

  • Patent number: 7493238
    Abstract: An abnormal noise correction verification apparatus is provided that can easily verify the effectiveness a corrective action with respect to an abnormal noise being generated. The apparatus has at least one vibration sensor, which detect vibrations of the vehicle. The apparatus extracts a signal in a specific frequency band for the vibrations detected from the vibration sensor. The apparatus stores a pre-corrective action signal extracted from the vibration sensor, which is from before eliminating a cause of abnormal noise, and a post-corrective action signal extracted from the vibration sensor, which is from after eliminating the cause of abnormal noise. Both pre-corrective action signal and the post-corrective action signal were detected under identical travel conditions by the vibration sensor. The apparatus then synchronizes and separately outputs the pre-corrective action signal and the post-corrective action signal for comparison.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: February 17, 2009
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Tsutomu Tanaka, Junichi Kawano, Toshiaki Yoshida, Junichi Amakatsu