Patents by Inventor Karl G. Preis

Karl G. Preis 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).

  • Aqua-cultivation apparatus and method
    Patent number: 4846107
    Abstract: This apparatus can aqua-cultivate respective plant or animal varieties in fresh or sea water. The apparatus includes a reservoir having an inlet and outlet for containing the fresh or sea water together with the respective plants or animal varieties. A filter is coupled between the inlet and outlet in order to circulate and filter the water. A compressed air facility is coupled to the reservoir for increasing the pressure within it. Measurement instruments are coupled to the reservoir for providing a state signal signifying the state of the water in the reservoir.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: July 11, 1989
    Inventors: Horst Fenske, Karl G. Preis