Patents by Inventor Alfred Raia

Alfred Raia 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).

  • Ladder extension and leveler
    Patent number: 3998293
    Abstract: A ladder extension and level that is adapted to be used in conjunction with ladders having hollow rungs and a further embodiment for solid rung ladders.
    Type: Grant
    Filed: August 14, 1975
    Date of Patent: December 21, 1976
    Assignee: Lawrence Peska Associates, Inc.
    Inventor: Alfred Raia