Patents by Inventor John A. Sherlock

John A. Sherlock 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).

  • Ultrasound transducer for enhancing signal reception in ultrasound equipment
    Patent number: 4427912
    Abstract: An ultrasonic transducer assembly having three layers. The front and back layers are made of piezoelectric materials, and are acoustically matched by the intermediate layer. The back layer functions as an ultrasound transmitter, and the front layer functions both as a transmission matching layer and as an ultrasound receiver. During reception, by delaying the signal which is generated by the front layer so that it is in phase with a signal which appears across the back layer and then adding them together, the back layer also functions to enhance the received signal.
    Type: Grant
    Filed: May 13, 1982
    Date of Patent: January 24, 1984
    Assignee: Ausonics Pty. Ltd.
    Inventors: Tuan S. Bui, John A. Sherlock