Patents by Inventor Manuel J. Marquez

Manuel J. Marquez 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).

  • Patent number: 4100998
    Abstract: A platform mounted on rails on each side of the platforms can slide on a round headed bolt attached to each of the inside surfaces of a ladder and the platform can be secured by a clamp at a distal end of the platform to a rung of the ladder, a bearing attached to the front edge of the platform and attached to a support arm can be attached to a lower rung of the ladder by a clamp attached to a distal end of the support arm to support the front edge of the platform, and a front lip attached to a front edge of the platform can be used to pull the step forward and backwards; a rugging material can be attached to a surface of the platform to comfort the feet of a user.
    Type: Grant
    Filed: October 14, 1976
    Date of Patent: July 18, 1978
    Assignee: The Raymond Lee Organization, Inc.
    Inventor: Manuel J. Marquez