Patents by Inventor Eugene Stevens

Eugene Stevens 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).

  • Apparatus for deactivating a surveillance tag
    Patent number: 4318090
    Abstract: A pulse source powers a wand-like probe with spaced contacts that is arranged to be applied to and drawn along the surface of a surveillance tag that contains a diode semiconductor with exposed terminals. When the probe contacts engage the diode terminals, current is passed through the diode sufficient to destroy its unidirectional conducting characteristics and thereby deactivate the tag. A cut-out circuit is included to prevent the passage of excessive current through the diode or damaging short-circuiting of the power amplifier output.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: March 2, 1982
    Assignee: Sensormatic Electronics Corporation
    Inventors: Douglas A. Narlow, Eugene Stevens