Patents by Inventor Keith J. Marenger

Keith J. Marenger 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).

  • Dolly modifying apparatus
    Patent number: 5253887
    Abstract: An apparatus for converting a four wheel dolly into a form useful for supporting and transporting large objects. The apparatus includes a selectively detachable frame having a upwardly projecting triangularly portion extending from a base member and an extender which is attachable to the base portion. The detachable frame is secured to the dolly by an adjustable slide bar.
    Type: Grant
    Filed: April 3, 1992
    Date of Patent: October 19, 1993
    Inventor: Keith J. Marenger