Patents by Inventor Masaaki Ebihara

Masaaki Ebihara 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).

  • Method of detecting a defective position in a cement intimate mixture filled portion in a building
    Patent number: 4918988
    Abstract: The surface of a cement intimate mixture filled portion in a building is tapped by a hammer, and a tapping sound thus generated is received by a micropone and converted to an electrical signal. The electrical signal representing the attenuation characteristic, which is different depending on the presence or absence of a defective unfilled portion in the cement filled portion, is sampled to obtain a maximum peak value and/or an integrated value. The maximum peak value and/or the integrated value is compared with a reference value to decide the presence or absence of a defect in the cement filled portion.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: April 24, 1990
    Assignee: Taisei Corporation
    Inventors: Masaaki Ebihara, Kyosuke Nomura