Patents by Inventor Rex A. Guinn

Rex A. Guinn 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 apparatus for the injection molding of circuit boards
    Patent number: 4861534
    Abstract: A family of circuit boards are molded, each board having its own unique pattern of recessed circuit paths and component insertion through-holes. A different mold is provided for each different member of the family. The two cavity blocks of each mold cavity contain only the holes that are necessary to define the through-hole pattern for that member of the family. A plurality of core pins or wires are provided at the molding site. Only the core pins that are required by the mold in use at the molding site are rendered operative.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: August 29, 1989
    Assignee: International Business Machines Corporation
    Inventors: Russell W. Boehm, Rex A. Guinn, Hans J. Koerner