Patents by Inventor Phillip McKenna

Phillip McKenna 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).

  • Step attachment for ladders
    Patent number: 4241807
    Abstract: A step attachment for conventional ladders includes two widened, horizontal steps, one in parallel, spaced-apart relation over the other, the forward edge of each step being positioned in the plane of the ladder and adapted for attachment to respective adjacent rungs of the ladder, and two substantially vertical support hangers pivotally and adjustably attached to the rear ends of the steps, the upper ends of which hangers are also positioned in the plane of the ladder and adapted for attachment to a rung of the ladder above the steps and to depend from the rung a sufficient distance downward to accommodate the pivotal, adjustable attachment of the steps to the hangers.
    Type: Grant
    Filed: November 17, 1978
    Date of Patent: December 30, 1980
    Assignee: MacStep Co., Inc.
    Inventors: Phillip McKenna, Arthur Penarowski