TREA

John Helmut Hradil

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  • North Delta, CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Continuous loading apparatus
    • Patent number 4,749,326
    • Issue date Jun 7, 1988
    • Inco Limited
    • Richard Crawshay
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Continuous loading apparatus and method
    • Patent number 4,648,776
    • Issue date Mar 10, 1987
    • Inco Limited
    • John H. Hradil
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Diamond drill supporting apparatus
    • Patent number 3,951,216
    • Issue date Apr 20, 1976
    • Canadian Mine Services Ltd.
    • Richard Crawshay
    • E21 - EARTH DRILLING MINING