Patents by Inventor Michael F. Stringfellow

Michael F. Stringfellow 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).

  • Surge suppression circuit for high frequency communication networks
    Patent number: 5124873
    Abstract: A surge suppression circuit for use in a high frequency communication network, having a primary line and a ground line, includes a gas tube connected between the primary line and ground line, a bi-directional avalanche diode and one or more ferrite beads connected in series between the primary line and ground line, and a metal oxide varistor connected in series in the primary line.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: June 23, 1992
    Assignee: EFI Corporation
    Inventors: John M. Wheeler, Michael F. Stringfellow