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John D. Barrett

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  • Brooklyn, NY, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of replacing sheave liner
    • Patent number 5,792,294
    • Issue date Aug 11, 1998
    • Otis Elevator Company
    • John Randazzo
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Rope cleaning device
    • Patent number 5,784,752
    • Issue date Jul 28, 1998
    • Otis Elevator Company
    • John D. Barrett
    • B66 - HOISTING LIFTING HAULING