Donal Jay Armstrong

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St. Louis Park, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Corner block for use in forming a corner of a segmental retaining wall
- Patent number 6,862,856
- Issue date Mar 8, 2005
- Anchor Wall Systems, Inc.
- John Walter Turgeon-Schramm
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

Patents Applicationslast 30 patents

Information Patent Application
Corner block for use in forming a corner of a segmental retaining wall
- Publication number 20030150184
- Publication date Aug 14, 2003
- John Walter Turgeon-Schramm
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING