Patents by Inventor Ari T. Jarvi

Ari T. Jarvi 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).

  • Improving the discrimination of an impulse technique metal detector by correlating responses inside and outside of a cut-off peak area
    Patent number: 5047718
    Abstract: The invention relates to a method for detecting metal objects, particularly to improving discrimination in a metal detector, where at least two responses are defined for metal objects passing through the metal detector. According to the invention, the correlation of the responses is examined within a determined time period in the metal detector, and at least one parameter is formed of these responses in order to define the group of objects that caused the response.
    Type: Grant
    Filed: January 30, 1990
    Date of Patent: September 10, 1991
    Assignee: Outokumpu Oy
    Inventors: Kari T. J. Aittoniemi, Ari T. Jarvi