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Abrasive pipe saw
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Issue date Oct 18, 1988
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Herbert C. Southoff
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B28 - WORKING CEMENT, CLAY, OR STONE
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3727599
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Patent number 3,727,599
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Issue date Apr 17, 1973
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B28 - WORKING CEMENT, CLAY, OR STONE
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3406599
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Patent number 3,406,599
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Issue date Oct 22, 1968
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B28 - WORKING CEMENT, CLAY, OR STONE
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3216295
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Patent number 3,216,295
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Issue date Nov 9, 1965
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B28 - WORKING CEMENT, CLAY, OR STONE
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3086509
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Patent number 3,086,509
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Issue date Apr 23, 1963
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B28 - WORKING CEMENT, CLAY, OR STONE
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2612001
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Patent number 2,612,001
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Issue date Sep 30, 1952
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B28 - WORKING CEMENT, CLAY, OR STONE
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2607376
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Patent number 2,607,376
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Issue date Aug 19, 1952
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B28 - WORKING CEMENT, CLAY, OR STONE
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2568280
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Patent number 2,568,280
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Issue date Sep 18, 1951
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B28 - WORKING CEMENT, CLAY, OR STONE
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2381156
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Patent number 2,381,156
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Issue date Aug 7, 1945
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B28 - WORKING CEMENT, CLAY, OR STONE
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1497389
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Patent number 1,497,389
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Issue date Jun 10, 1924
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B28 - WORKING CEMENT, CLAY, OR STONE