Patents by Inventor Ronald Barend Van Santbrink

Ronald Barend Van Santbrink 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).

  • Method and system for contactless exchange of data between a read/write unit and one or more information carriers
    Patent number: 6014088
    Abstract: A method and system for contactless exchange of information between a read/write unit and at least one information carrier, using wireless radiofrequency signal transmission including an input/output circuit and associated coil device and the information carrier including another input/output circuit and associated coil device, and each further including a processing circuit. The read/write unit transmits radiofrequency signals divided in time slots, each successively including a sync pulse and a single data bit. The radiofrequency signal is suppressed in each time slot for a period differing in length for the one and the zero data bit. The data bit signal, received in the read/write unit solely during transmission of the radiofrequency signal, is sampled, after rectification, for detection of the data bits of the information carrier.
    Type: Grant
    Filed: November 29, 1996
    Date of Patent: January 11, 2000
    Assignee: Ronald Barend Van Santbrink
    Inventors: Ronald Barend Van Santbrink, Dirk Langedijk, Jan Peter Exalto