Patents by Inventor Adriaan Walraven

Adriaan Walraven 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 for checking the tightness of a casing, and device for carrying out said method
    Patent number: 5070724
    Abstract: A method and device for checking the tightness of a casing which is, filled with a gaseous medium, immersed in a container with liquid medium placed in a chamber of which the interior is insulated for sound and vibrations, the output signals of a sensor in contact with the container wall being amplified, filtered and evaluated.
    Type: Grant
    Filed: July 24, 1990
    Date of Patent: December 10, 1991
    Assignee: Wubs Technologie B.V.
    Inventors: Klaas Wubs, Adriaan Walraven