Patents by Inventor Michael P. Cummings

Michael P. Cummings 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).

  • Movable scaffold rung
    Patent number: 4903795
    Abstract: Construction scaffolding comprising adjacent end frames with joined vertical support members is provided with movable rung members that are extendible and retractable, that engage the exterior surface of the vertical support members, and that are secured to the support members by clamp members having quick-release threaded fasteners.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: February 27, 1990
    Inventor: Michael P. Cummings