Patents by Inventor Tallienco W. Fockens

Tallienco W. Fockens 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).

  • Shoplifting detection system with partly screened antennas
    Patent number: 5367291
    Abstract: An electromagnetic shoplifting detection system of the type operating with a high-frequency detection field, including at least one antenna coil (6, 7) mounted adjacent to or on a checkout unit (K1, K2) for generating an electromagnetic alternating field by which detection labels having a resonant circuit can be detected, the checkout unit containing electrically conducting elements (11) in which elements in operation parasitic currents are produced due to the alternating field, and which conducting elements form a parasitic signal path, and devices (20, 30) arranged between the at least one antenna and the checkout unit for providing an electromagnetic shield between the at least one antenna coil and checkout unit.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: November 22, 1994
    Assignee: N.V. Nederlandsche Apparatenfabriek Nedap
    Inventor: Tallienco W. Fockens