Patents by Inventor Joseph Fielding

Joseph Fielding 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).

  • Electrostrictive ultrasonic probe having expanded operating temperature range
    Patent number: 5345139
    Abstract: An ultrasonic electrostrictive transducer for transmitting and receiving ultrasonic energy and having an expanded operating temperature range, preferably about room temperature. The transducers may be made from PMN-PT solid solutions having select mole percentages of PT and being doped with La, whereby the operating temperature range about a given operating temperature may be effectively doubled.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: September 6, 1994
    Assignee: Hewlett-Packard Company
    Inventors: Turuvekere R. Gururaja, Joseph Fielding, Thomas R. Shrout, Sei-Joo Jang