Patents by Inventor Jack T. Spence

Jack T. Spence 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).

  • Display case with castellated tongue and groove joints
    Patent number: 4402397
    Abstract: A plastic display case which may be assembled from essentially flat components is provided with a castellated tongue and groove construction. This particular construction allows extremely high stacking strength to be provided from a relatively thin gauge material.
    Type: Grant
    Filed: November 28, 1980
    Date of Patent: September 6, 1983
    Inventor: Jack T. Spence