TREA

Berthold A. Fehn

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  • Krefeld, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Sludge flow measuring system
    • Patent number RE35473
    • Issue date Mar 11, 1997
    • Schwing America, Inc.
    • Edward A. Oakley
    • 417 - Pumps
  • Information Patent Grant

    Sludge Pump
    • Patent number 5,507,624
    • Issue date Apr 16, 1996
    • Friedrich Wilhelm Schwing GmbH
    • Berthold A. Fehn
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Sludge flow measuring system
    • Patent number 5,346,368
    • Issue date Sep 13, 1994
    • Schwing America, Inc.
    • Edward A. Oakley
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Sludge flow measuring system
    • Patent number 5,257,912
    • Issue date Nov 2, 1993
    • Schwing America, Inc.
    • Edward A. Oakley
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Sludge flow measuring system
    • Patent number 5,106,272
    • Issue date Apr 21, 1992
    • Schwing America, Inc.
    • Edward A. Oakley
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...