Patents by Inventor Helmut Woll

Helmut Woll 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 test head
    Patent number: 4751420
    Abstract: An ultrasonic test head including an oscillating crystal (1). A damping body (2) is mounted on the side of the crystal which faces away from the sonic beam direction. The damping body includes a plurality of sound-conducting and sound-absorbing lamellae (3, 5) which are stacked alternately on one another and each have one side thereof coupled to the oscillating crystal (1) thereby providing a high acoustic impedance as well as a high acoustic absorption.
    Type: Grant
    Filed: November 5, 1986
    Date of Patent: June 14, 1988
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung e.V.
    Inventors: Wolfgang Gebhardt, Helmut Woll