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Roll formed steel beam
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Patent number 9,975,577
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Issue date May 22, 2018
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iSpan Systems LP
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Michael R. Strickland
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E04 - BUILDING
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Composite steel joist
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Patent number 8,943,776
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Issue date Feb 3, 2015
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iSpan Systems LP
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Michael R. Strickland
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E04 - BUILDING
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Cold-formed steel joist
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Patent number 8,407,966
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Issue date Apr 2, 2013
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iSpan Systems LP
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Michael R. Strickland
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Unitary steel joist
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Patent number 8,281,540
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Issue date Oct 9, 2012
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iSpan Systems LP
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Michael Richard Strickland
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E04 - BUILDING