Patents by Inventor Allie E. Webb

Allie E. Webb 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 levelling system
    Patent number: 4304318
    Abstract: A ladder levelling device used in combination with a ladder on inclined ground surfaces, which levelling device is placed under one leg of the ladder while the other leg rests on the ground surface or some other support, comprises a triangular, inclined platform including an open cavity area defined in its bottom side. The levelling device provides a stable, as well as a level ladder.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: December 8, 1981
    Inventor: Allie E. Webb