Patents by Inventor Boris Zhevlev

Boris Zhevlev 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).

  • Acoustic anti-tampering detector
    Patent number: 5608377
    Abstract: A method of supervising the operation of an intrusion detector having a housing, the method including periodically generating in the housing at least one sound wave signal, sensing an acoustic image formed in the housing in response to the at least one sound wave signal, constructing a sensed signal envelope responsive to the sensed acoustic image, periodically comparing the sensed signal envelope with a reference signal envelope to determine whether a predetermined criterion of similarity between the sensed signal envelope and the reference signal envelope is met and, if the similarity criterion is not met, providing a predetermined, sensible, indication.
    Type: Grant
    Filed: October 20, 1995
    Date of Patent: March 4, 1997
    Assignee: Visonic Ltd.
    Inventors: Boris Zhevlev, Mark Moldavsky