Patents by Inventor Johannes Josephus Van Vlerken

Johannes Josephus Van Vlerken 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).

  • Optical record carrier
    Publication number: 20050105426
    Abstract: An optical record carrier (1) is provided with tracks having a groove (4) wobbled in a transverse direction and predetermined positions (18) along the track. The wobble comprises a substantially monotonous undulation (15). Local excursions (16) of the groove superposed on the undulation at the predetermined positions represent position information, such as addresses. The spatial frequency of the undulation is lower than that of the excursions.
    Type: Application
    Filed: December 23, 2004
    Publication date: May 19, 2005
    Inventors: Johannes Spruit, Johannes Josephus Van Vlerken