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Roof support truss
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Patent number 6,884,005
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Issue date Apr 26, 2005
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Ben L. Seegmiller
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E21 - EARTH DRILLING MINING
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Cable bolt spinning tool
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Patent number 6,244,787
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Issue date Jun 12, 2001
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Ben L. Seegmiller
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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Anchor structure
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Patent number 5,544,980
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Issue date Aug 13, 1996
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Ben L. Seegmiller
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E21 - EARTH DRILLING MINING
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Support sling
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Patent number 5,425,602
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Issue date Jun 20, 1995
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Ben L. Seegmiller
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E21 - EARTH DRILLING MINING
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Mine support post
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Patent number 5,228,810
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Issue date Jul 20, 1993
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Ben L. Seegmiller
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E21 - EARTH DRILLING MINING
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Yieldable mine post
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Patent number 5,015,125
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Issue date May 14, 1991
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Ben L. Seegmiller
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E21 - EARTH DRILLING MINING
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Rock bolt structure
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Patent number 4,666,345
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Issue date May 19, 1987
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Ben L. Seegmiller
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E21 - EARTH DRILLING MINING
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