Patents by Inventor Anthony J. Maher

Anthony J. Maher 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).

  • Search head for metal detectors
    Patent number: 4959636
    Abstract: A search head for a metal detector, the head comprising a support body and three conductive loops mounted on the body, the loops being formed from a single ribbon cable. An oscillating signal is applied to one of the loops and induced voltages in the other two loops are subtracted, the arrangement being such that a difference will appear in the subtracted voltages when a metal object is closer to the other two loops.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: September 25, 1990
    Assignee: Detection Systems Pty. Ltd.
    Inventor: Anthony J. Maher