Patents by Inventor Virgil S. Mirles

Virgil S. Mirles 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).

  • Adjustable ladder apparatus
    Patent number: 5154257
    Abstract: A ladder apparatus including a plurality of spaced parallel ladder legs, with each ladder leg telescopingly mounting an extension leg relative to each ladder leg to accommodate uneven surface conditions. Interlocking structure is provided to secure each respective extension leg relative to a receiving cylinder relative to each ladder leg.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: October 13, 1992
    Inventor: Virgil S. Mirles