Patents by Inventor Josif Goizman

Josif Goizman 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).

  • Electric field change sensor employing mains wiring as the transmitting antenna
    Patent number: 4504822
    Abstract: A system for recognizing the intrusion of a conductive or semi-conductive article recognizes the intrusion of the article into an area having an ambient electric field by detecting changes in the electric field. The system basically consists of a transmitter for transmitting an electric field and a receiver for receiving the electric field and for detecting the changes in the field. The transmitter is adapted to be connected to the mains wiring whereby the ground of the mains wiring comprises the transmitting antenna of the system.
    Type: Grant
    Filed: December 29, 1981
    Date of Patent: March 12, 1985
    Inventor: Josif Goizman