TREA

Christopher A. Johnston

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  • Portland, OR, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Wear assembly for earth working equipment
    • Patent number 11,447,937
    • Issue date Sep 20, 2022
    • ESCO Group LLC
    • Abram Hernandez
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Wear assembly having a lock
    • Patent number 11,155,982
    • Issue date Oct 26, 2021
    • ESCO Group LLC
    • Christopher A. Johnston
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Lock for a wear assembly
    • Patent number 10,655,307
    • Issue date May 19, 2020
    • ECSO Group LLC
    • Christopher A. Johnston
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Lock for a wear assembly
    • Patent number 10,024,036
    • Issue date Jul 17, 2018
    • ESCO Corporation
    • Christopher A. Johnston
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Wear assembly
    • Patent number 9,322,150
    • Issue date Apr 26, 2016
    • ESCO Corporation
    • Christopher A. Johnston
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

Patents Applicationslast 30 patents

  • Information Patent Application

    WEAR ASSEMBLY
    • Publication number 20220325505
    • Publication date Oct 13, 2022
    • ESCO Group LLC
    • Christopher A. Johnston
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    WEAR ASSEMBLY FOR EARTH WORKING EQUIPMENT
    • Publication number 20200256040
    • Publication date Aug 13, 2020
    • ESCO Group LLC
    • Abram Hernandez
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    WEAR ASSEMBLY
    • Publication number 20200240120
    • Publication date Jul 30, 2020
    • ESCO Group LLC
    • Christopher A. Johnston
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    LOCK FOR A WEAR ASSEMBLY
    • Publication number 20180148908
    • Publication date May 31, 2018
    • Esco Corporation
    • Christopher A. Johnston
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    WEAR ASSEMBLY
    • Publication number 20160201299
    • Publication date Jul 14, 2016
    • Esco Corporation
    • Christopher A. Johnston
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    WEAR ASSEMBLY
    • Publication number 20140215868
    • Publication date Aug 7, 2014
    • Esco Corporation
    • Christopher A. Johnston
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING