Patents by Inventor Lammert de Haan

Lammert de Haan 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).

  • Aquarium receptacle comprising a water purification system
    Patent number: 4844013
    Abstract: An aquarium receptacle comprising a habitat for fishes, to be filled with water, and a water purification system including an array of adjoining chambers interconnected so as to be suitable for the passage of liquid. The array of chambers, adjoining the habitat to be filled with water, is incorporated in the receptacle to a component integral therewith. The water purification system is self-supporting in realizing a continuous total purification of the water in the aquarium.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: July 4, 1989
    Assignee: Minireef B.V.
    Inventors: Lammert de Haan, Johan Blok