TREA

Douglas C. Duffy

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  • West Ryde, AU
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Patents Grantslast 30 patents

  • Information Patent Grant

    Drum or pail closure
    • Patent number 5,086,944
    • Issue date Feb 11, 1992
    • Rheem Autralia Ltd.
    • Douglas C. Duffy
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Method of forming a drum or pail closure
    • Patent number 4,938,051
    • Issue date Jul 3, 1990
    • Rheem Australia Limited
    • Douglas C. Duffy
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...