TREA

Donald F. Graveman

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  • St. Charles, MO, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hammermill with intersticed multilength hammers
    • Patent number 5,628,467
    • Issue date May 13, 1997
    • Magnatech Engineering, Inc.
    • Donald F. Graveman
    • B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
  • Information Patent Grant

    Double rotor hammermill
    • Patent number 5,562,257
    • Issue date Oct 8, 1996
    • Magnatech Engineering Incorporated
    • Donald F. Graveman
    • B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
  • Information Patent Grant

    Hammer-type shredder with air deflector
    • Patent number 4,720,051
    • Issue date Jan 19, 1988
    • American Pulverizer Company
    • Donald F. Graveman
    • B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
  • Information Patent Grant

    Material handling facility
    • Patent number 4,205,795
    • Issue date Jun 3, 1980
    • American Pulverizer Company
    • Donald F. Graveman
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Reinforced ring hammer
    • Patent number 4,149,677
    • Issue date Apr 17, 1979
    • American Pulverizer Company
    • Donald F. Graveman
    • B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
  • Information Patent Grant

    Material reducing machine
    • Patent number 4,009,836
    • Issue date Mar 1, 1977
    • American Pulverizer Company
    • Sven B. Strom
    • B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
  • Information Patent Grant

    Coal crusher
    • Patent number 3,934,826
    • Issue date Jan 27, 1976
    • American Pulverizer Company
    • Donald F. Graveman
    • B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...