Patents by Inventor Wade E. Radford

Wade E. Radford 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).

  • Coherent inductive communications link for biomedical applications
    Patent number: 4561443
    Abstract: A two-way coherent inductive communications link between an external transceiver and an internal transceiver located in a biologically implanted programmable medical device. Digitally formatted command data and programming data is transmitted to the implanted medical device by frequency shift keying the inductive communications link. Internal transceiver is powered by the inductive field between internal and external transceivers. Digitally formatted data is transmitted to external transceiver by internal transceiver amplitude modulating inductive field. Immediate verification of the establishment of a reliable communications link is provided by determining existence of frequency lock and bit phase lock between internal and external transceivers.
    Type: Grant
    Filed: March 8, 1983
    Date of Patent: December 31, 1985
    Assignee: The Johns Hopkins University
    Inventors: Arthur F. Hogrefe, Wade E. Radford