Patents by Inventor Johannes A. M. Van Egmond

Johannes A. M. Van Egmond 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: 4398298
    Abstract: A communication system comprising a connecting line and stations connected thereto, each station having free access to the connecting line. In a station which requests or has access, a transmitting stage and a receiving stage are both connected to the line, the output impedance of the transmitting stage on the supply of a predetermined logic value being temporarily increased to at least the order of magnitude of the characteristic impedance of the line, and a detector which is coupled to an output of the receiving stage producing a detection signal which switches off the transmitting station when the receiving stage receives a value which differs from the predetermined logic value.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: August 9, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Johannes A. M. Van Egmond, Johannes Klein, Engbert Tienkamp