Patents Assigned to Firma Carl Fredenberg
  • Cartridge filter with frame
    Patent number: 6059966
    Abstract: A cartridge filter has a filter element and a frame formed of plates. The plates are installable around the filter element and are interconnectable in the area of the sides of the plates. The plates have plug-in connection members which interact with corresponding plug-in connection members of adjacent plates to thereby affix the plates to one another.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: May 9, 2000
    Assignee: Firma Carl Fredenberg
    Inventors: Andreas Brandhofer, Matthias Schuster, Hans-Joachim Lippold, Jorgen Knudsen, Margit Hofmann