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Diamond saw blade
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Patent number 6,321,738
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Issue date Nov 27, 2001
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Diamond Products Joint Venture
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Thomas K. Walsh
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B28 - WORKING CEMENT, CLAY, OR STONE
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Diamond core drill bit
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Patent number 5,996,571
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Issue date Dec 7, 1999
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Diamond Products Joint Venture
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Andrew L. Jedick
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B28 - WORKING CEMENT, CLAY, OR STONE
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Drill rig
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Patent number 5,794,724
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Issue date Aug 18, 1998
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Diamond Products Joint Venture
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Karl H. Moller
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B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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