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Vented steamer port cap assembly
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Patent number 7,766,027
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Issue date Aug 3, 2010
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Davidson Hydrant Technologies, Inc.
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Tom R. Davidson, Sr.
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Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
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Trench box safety ladder
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Patent number 7,530,767
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Issue date May 12, 2009
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Davidson Equipment Leasing LLLP
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Tom Randy Davidson, Sr.
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Breathable fire hydrant rod
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Patent number 7,428,910
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Issue date Sep 30, 2008
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Davidson Hydrant Technologies, Inc.
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Tom R. Davidson, Sr.
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A62 - LIFE-SAVING FIRE-FIGHTING