Patents by Inventor Dirk J. Kroon

Dirk J. Kroon 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: 4449198
    Abstract: A device for interactive video playback utilizing a modified playback apparatus for video discs. Such a video disc contains stored video information and possibly also audio information. The various playback and addressing modes can be activated by operation of buttons. The information read is directly suitable for playback on a television screen. The playback apparatus is modified for executing these playback and addressing modes also under the control of selection signals received from a computer. There is also provided an extraction element for extracting the frame numbers from the information read and for supplying these numbers as data to the computer. The computer furthermore includes a read/write memory for the storage of the information of alphanumerical characters and of selection signals for the playback apparatus. In some cases, the latter signals are activatable only by a request signal. The computer also includes an output for said alphanumerical characters as additional display information.
    Type: Grant
    Filed: January 23, 1980
    Date of Patent: May 15, 1984
    Assignee: U.S. Philips Corporation
    Inventors: Dirk J. Kroon, Klaas H. J. Robers