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Friedrich W. Herfeld

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  • 5982 Neuenrade, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Mixer
    • Patent number 4,930,897
    • Issue date Jun 5, 1990
    • Friedrich W. Herfeld
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Apparatus for mixing material
    • Patent number 4,918,665
    • Issue date Apr 17, 1990
    • Friedrich W. Herfeld
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Mixing apparatus
    • Patent number 4,781,468
    • Issue date Nov 1, 1988
    • Friedrich W. Herfeld
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Mixing device
    • Patent number 4,671,666
    • Issue date Jun 9, 1987
    • Friedrich W. Herfeld
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Double-cone rotating mixer
    • Patent number 4,372,686
    • Issue date Feb 8, 1983
    • Friedrich W. Herfeld
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Mixing apparatus and method for condensing, mixing and granulating...
    • Patent number 4,325,515
    • Issue date Apr 20, 1982
    • Friedrich W. Herfeld
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Circulation mixer
    • Patent number 4,159,880
    • Issue date Jul 3, 1979
    • Friedrich W. Herfeld
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL