Patents by Inventor Willem O. de Jong

Willem O. de Jong 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).

  • Contactlessly operating electronic responder card
    Patent number: 5428214
    Abstract: A contactlessly operating electronic responder card comprises an electronic circuit incorporated into the card and an antenna coil incorporated into the card. According to the invention, the antenna coil is made from thin insulated wire which is wound in a winding space formed by a very thin flexible coil bobbin, whilst the coil bobbin further comprises a chamber into which the electronic circuit has been incorporated and the antenna coil and the electronic circuit are covered by finishing material.
    Type: Grant
    Filed: May 11, 1993
    Date of Patent: June 27, 1995
    Assignee: N.V. Nederlandsche Apparatenfabriek Nedap
    Inventors: Albert J. Hakkers, Willem O. de Jong