TREA

Durward A. Hisey

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

  • Information Patent Grant

    Adjustable chimney cap support
    • Patent number 4,697,500
    • Issue date Oct 6, 1987
    • Hy-C Company, Inc.
    • Durward A. Hisey
    • F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
  • Information Patent Grant

    Chimney cap
    • Patent number 4,535,686
    • Issue date Aug 20, 1985
    • Hy-C Company, Inc.
    • Durward A. Hisey
    • F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
  • Information Patent Grant

    Chimney cap
    • Patent number 4,534,280
    • Issue date Aug 13, 1985
    • Hy-C Company, Inc.
    • Durward A. Hisey
    • F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
  • Information Patent Grant

    Chimney cap
    • Patent number 4,436,021
    • Issue date Mar 13, 1984
    • HY-C Company Inc.
    • Durward A. Hisey
    • F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES