Patents by Inventor Dieter G. A. Klefisch

Dieter G. A. Klefisch 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).

  • Dredge units
    Patent number: 3950246
    Abstract: A dredge unit having a buoyant support carrying a sluice box suspended beneath, a water suction system connected to an outlet end on the box and a suction hose operatively connected to an inlet end thereof. The water suction system operates to draw water and material through the suction hose and into the sluice box where material of relatively high specific gravity is contained while the remainder and the water is discharged from the system.
    Type: Grant
    Filed: December 10, 1974
    Date of Patent: April 13, 1976
    Inventor: Dieter G. A. Klefisch