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Joseph M. Friederichs

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  • Lakeville, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Retaining wall block system
    • Patent number 9,028,175
    • Issue date May 12, 2015
    • Keystone Retaining Wall Systems LLC
    • Joseph M. Friederichs
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Retaining wall block system
    • Patent number 8,622,659
    • Issue date Jan 7, 2014
    • Keystone Retaining Wall Systems LLC
    • Joseph M. Friederichs
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

Patents Applicationslast 30 patents

  • Information Patent Application

    LANDSCAPE EDGING SYSTEM
    • Publication number 20140259902
    • Publication date Sep 18, 2014
    • KEYSTONE RETAINING WALL SYSTEMS LLC
    • Joseph M. Friederichs
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Application

    RETAINING WALL BLOCK SYSTEM
    • Publication number 20140105691
    • Publication date Apr 17, 2014
    • KEYSTONE RETAINING WALL SYSTEMS LLC
    • Joseph M. Friederichs
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    RETAINING WALL BLOCK SYSTEM
    • Publication number 20110243669
    • Publication date Oct 6, 2011
    • KEYSTONE RETAINING WALL SYSTEMS, INC.
    • Joseph M. Friederichs
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING