Patents by Inventor W. Donnell Allen

W. Donnell Allen 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).

  • Double-return joist
    Patent number: D944418
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: February 22, 2022
    Assignee: SUPER STUD BUILDING PRODUCTS, INC.
    Inventors: Raymond C. Frobosilo, W. Donnell Allen