Patents by Inventor Ludovicus M. C. Verhulst

Ludovicus M. C. Verhulst 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).

  • Patent number: RE34475
    Abstract: A compact-disc digital audio player is described in which a user can store preferred selections on selected discs in a memory. The player can identify the disc from the subcode on the disc and can read the corresponding preferred selection out of the memory to play this preferred selection.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: December 14, 1993
    Assignee: U.S. Philips Corporation
    Inventors: Pieter H. Custers, Ludovicus M. C. Verhulst