Patents by Inventor Hisanaga Tanaka

Hisanaga Tanaka 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 and apparatus for ultrasonic wave measurement
    Patent number: 6094987
    Abstract: First and second ultrasonic sensors 1A and 2A are arranged facing each other, and these ultrasonic sensors 1A and 2A are provided with first and second reflectors 1 and 2 on their surface, respectively, and thereby, a propagation time t.sub.t of ultrasonic wave in a distance L within a medium subject to measurement is determined from the following equation t.sub.t =(t.sub.4 -t.sub.3 +t.sub.2 -t.sub.1)/2.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: August 1, 2000
    Assignee: Fuji Ultrasonic Engineering Co. Ltd.
    Inventors: Hideyuki Suzuki, Hisanaga Tanaka, Hajime Hachisuka