Patents by Inventor Sadao Akishita

Sadao Akishita 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).

  • Failure diagnosis system for automobile engine
    Patent number: 5932801
    Abstract: A failure diagnosis system for automobile engines comprises an inverter motor (6) connected to a rotary shaft of an engine to be measured (2) and intended to rotate the engine (2), a microphone (8) for detecting an engine sound of the engine to be measured (2), a digital tape recorder for recording therein the engine sound detected by the microphone and an engine failure detector for extracting characteristics of the engine sound from the engine sound recorded in the recorder by a wavelet transform so as to detect a failure of the engine by the characteristics of the engine sound.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: August 3, 1999
    Assignee: Daifuku Co., Ltd.
    Inventors: Sadao Akishita, Ziye Li, Toshihiko Kato