Patents by Inventor James N. Derome

James N. Derome 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).

  • Extension device for a ladder
    Patent number: 5027923
    Abstract: An attachment for a ladder includes a housing and an extensible leg. The housing is clamped to the side of a ladder, and the extensible leg is extended to engage the ground after the ladder has been placed level. A bubble level is provided for visually determining when the ladder is level.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: July 2, 1991
    Inventor: James N. Derome