Patents by Inventor Toshio Shrasaka

Toshio Shrasaka 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).

  • Ultrasonic diagnosis apparatus
    Patent number: 4332171
    Abstract: An ultrasonic diagnosis apparatus is provided with a plurality of phased array transducer elements arranged in a row. The number of simultaneously driven transducer elements is changed in response to a rate pulse to increase the ultrasonic scanning line density without increasing the number of the transducer elements, while the position of the focal point is adjusted to maintain the minimum width position of the ultrasonic beam provided by the group of the simultaneously driven transducer elements substantially constant irrespective of the change of the number of the simultaneously driven transducer elements by controlling the phase of transmitted and received ultrasonic waves by means of delay elements.
    Type: Grant
    Filed: July 3, 1980
    Date of Patent: June 1, 1982
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Taketoshi Iida, Kazuyoshi Saito, Toshio Shrasaka, Yasuhiko Takemura