Patents by Inventor Hans Backman

Hans Backman 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).

  • Curbstone
    Patent number: 5077944
    Abstract: When laying solid curbstones a ditch must be dug into which the curbstone is placed. The ditch is then filled in order to support the curbstone. The ditch-digging is eliminated according to the present invention in that a continuous shell (1) with coating (2) of stone is placed on a supporting surface and anchored by a rod (4) which passes through a hole in one side wall, through a hole in the bottom and penetrates into the support surface.
    Type: Grant
    Filed: August 17, 1990
    Date of Patent: January 7, 1992
    Assignee: EBI Producter HB
    Inventor: Hans Backman