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| Patent (click title for USPTO full-text) |
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- “NUWALL precast segmental retaining wall system,” pending
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- “Precast post-tensioned segmental pole system,” U.S. Patent #6,851,231, 2005
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- “Continuous prestressed concrete bridge deck subpanel system," U.S. Patent #6,668,412, 2003
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- “Precast concrete sandwich panels,” Canadian Patent No. 2078062, 2002
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- “Method for manufacturing an improved prestressed concrete joist,” U.S. Patent #6,036,906, 2000
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- “Tension members for erecting structures,” U.S. Patent #6,138,309, 2000
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- “Precast concrete sandwich panels,” Norwegian Patent No. 303.237, 1998
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- “Prestressed concrete joist,” U.S. Patent #5,671,573, 1997
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- “Concrete framing system,” U.S. Patent #5,507,124, 1996
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- “Precast concrete sandwich panels,” U.S. Patent #5,440,845, 1995
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- “Construction elements,” U.S. Patent #5,123,777, 1992
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