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Cutting disc
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Patent number 5,839,423
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Issue date Nov 24, 1998
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Leon D. Jones
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B28 - WORKING CEMENT, CLAY, OR STONE
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Cutting disc with tabs
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Patent number 5,787,871
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Issue date Aug 4, 1998
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Western Saw, Inc.
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Leon D. Jones
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B28 - WORKING CEMENT, CLAY, OR STONE