Patents by Inventor Frederic M. MacKay

Frederic M. MacKay 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).

  • Multipart die for attachment of a metal clip
    Patent number: 4339940
    Abstract: A three part die forms a metal clip into a fixed diameter, circular configuration about a workpiece. The die is comprised of three separate die members which move radially toward and away from a fixed center point that defines the center of a first circle. A die engaging groove or channel is defined in the surface of each die member for cooperation with the metal clip. When the die is closed, the die channel defines a second circle which is concentric to the first circle.
    Type: Grant
    Filed: June 5, 1980
    Date of Patent: July 20, 1982
    Assignee: Tipper Tie, Inc.
    Inventors: Frederic M. MacKay, Gordon R. Winders, Thomas E. Whittlesey