Patents by Inventor Marvin P. Friedberg

Marvin P. Friedberg 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).

  • Rung fitting for playground equipment
    Patent number: 4248418
    Abstract: A rung assembly has an overall length just short of the spacing between a pair of posts to permit it to be positioned therebetween, after which the assembly can be mounted on the posts by means of axial bolts at the ends of the assembly.The bolts are so housed by assembly end fittings that rotation of the fittings not only rotates the bolts but facilitates their outward axial movement as demanded by their engagement with the posts.The assembly is of adjustable length to facilitate mounting it on variously spaced posts.
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: February 3, 1981
    Assignee: Cascade Pacific Lumber Company
    Inventor: Marvin P. Friedberg