Patents by Inventor Leonhard Fink

Leonhard Fink 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 and process for drawing water from a water-bearing strata
    Patent number: 4014387
    Abstract: In order to draw water free of sand from a well bored into a water-bearing strata a cylindrical permeable body is located concentrically within the perforated wall of the well. The cylindrical body may in turn comprise concentric outer and inner slotted tubes with a permeable cylinder or a granulate therebetween. The lower end of the cylindrical body is closed and the upper end is connected to a pump.
    Type: Grant
    Filed: January 10, 1975
    Date of Patent: March 29, 1977
    Assignee: Thyssen Plastik Anger KG
    Inventor: Leonhard Fink