Patents by Inventor Norman F. Callahan

Norman F. Callahan 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).

  • Metal treatment clamp and method and apparatus for using the same
    Patent number: 4844779
    Abstract: In a plating or anodizing operation, improved plating clamps are utilized to provide positive electrical connection between a work holding rack and an electrical conducting bus bar. In each of the clamps, the spring thereof is completely insulated from the electrical conducting bus bar to prevent failure thereof due to over heating.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: July 4, 1989
    Inventor: Norman F. Callahan