Patents by Inventor Thomas R. Allmand

Thomas R. Allmand 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).

  • Spiral staircase
    Patent number: D251805
    Type: Grant
    Filed: May 19, 1977
    Date of Patent: May 8, 1979
    Inventor: Thomas R. Allmand