Patents by Inventor Preston B. Johnson

Preston B. Johnson 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).

  • Electrical connector assembly with printed circuit board layout
    Patent number: 5281154
    Abstract: An electrical connector assembly includes a pair of spaced receptacle modules mounted to a first printed circuit board which is electrically coupled to a second printed circuit board spaced from and generally parallel to the first printed circuit board. A conductive ground plate is electrically coupled between the printed circuit boards and mechanically supports the circuit boards in their spaced generally parallel relationship. The ground plate is disposed perpendicular to the first and second printed circuit boards forming two separate compartments between the first and second printed circuit boards to provide electromagnetic interference isolation between the compartments. An electrical component such as transformer may be mounted on one side of the ground plate between the spaced generally parallel printed circuit boards, and the ground plate provides a heat sink for the transformer.
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: January 25, 1994
    Assignee: Molex Incorporated
    Inventors: Joseph D. Comerci, Burke J. Crane, Robert DeRoss, James K. Hollomon, Jr., Preston B. Johnson, Garth S. Jones, Kevin L. Nelson, Michael J. O'Connell