Patents by Inventor Normal L. Calhoun

Normal L. Calhoun 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).

  • Tambour door construction
    Patent number: 5372175
    Abstract: A tambour door for a cabinet having a series of hinged, vertical panel members which are precluded from moving vertically one with respect to the other by a plug which coacts with slots defined in the hinge elements connecting the adjacent tambour elongated panel members.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: December 13, 1994
    Assignee: Waterloo Industries, Inc.
    Inventors: Normal L. Calhoun, Richard D. Purchase