TREA

Shien F. Chang

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  • New York, NY, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bowl type grinding mill
    • Patent number 5,067,662
    • Issue date Nov 26, 1991
    • Shien F. Chang
    • B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
  • Information Patent Grant

    Grinding mill
    • Patent number 4,682,738
    • Issue date Jul 28, 1987
    • Shien F. Chang
    • B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...