Patents by Inventor Otto H. J. Gansewig

Otto H. J. Gansewig 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).

  • Apparatus for raking and levelling sand in a pit
    Patent number: 4284273
    Abstract: Apparatus for raking and levelling sand in a pit comprises a frame which is arranged to be movable over the pit on guides or rails and carries a skimming device associated with a rake consisting of at least one row of blades or tines. The blades or tines rake the sand and the skimming device levels it. The frame may also carry a roller arranged to roll the levelled sand.
    Type: Grant
    Filed: January 3, 1980
    Date of Patent: August 18, 1981
    Inventor: Otto H. J. Gansewig