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Concrete pipe machine
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Patent number 4,600,373
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Issue date Jul 15, 1986
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GHA Lock Joint, Inc.
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Harold V. Swanson
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B28 - WORKING CEMENT, CLAY, OR STONE
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Apparatus for transferring a mold
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Patent number 3,989,144
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Issue date Nov 2, 1976
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Nippon Concrete Industries Co. Ltd.
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Kenzo Momota
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B28 - WORKING CEMENT, CLAY, OR STONE
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Prestressed concrete pipe
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Patent number 3,982,565
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Issue date Sep 28, 1976
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Nippon Hume Pipe Company Limited
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Hideo Iida
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B28 - WORKING CEMENT, CLAY, OR STONE
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3778206
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Patent number 3,778,206
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Issue date Dec 11, 1973
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B28 - WORKING CEMENT, CLAY, OR STONE
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3773447
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Patent number 3,773,447
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Issue date Nov 20, 1973
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B28 - WORKING CEMENT, CLAY, OR STONE
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3577505
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Patent number 3,577,505
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Issue date May 4, 1971
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B28 - WORKING CEMENT, CLAY, OR STONE
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3087222
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Patent number 3,087,222
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Issue date Apr 30, 1963
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B28 - WORKING CEMENT, CLAY, OR STONE
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3077013
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Patent number 3,077,013
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Issue date Feb 12, 1963
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B28 - WORKING CEMENT, CLAY, OR STONE
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2962787
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Patent number 2,962,787
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Issue date Dec 6, 1960
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B28 - WORKING CEMENT, CLAY, OR STONE
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2936505
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Patent number 2,936,505
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Issue date May 17, 1960
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B28 - WORKING CEMENT, CLAY, OR STONE
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2932874
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Patent number 2,932,874
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Issue date Apr 19, 1960
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B28 - WORKING CEMENT, CLAY, OR STONE
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2850784
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Patent number 2,850,784
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Issue date Sep 9, 1958
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B28 - WORKING CEMENT, CLAY, OR STONE
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2776450
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Patent number 2,776,450
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Issue date Jan 8, 1957
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B28 - WORKING CEMENT, CLAY, OR STONE
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2675333
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Patent number 2,675,333
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Issue date Apr 13, 1954
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B28 - WORKING CEMENT, CLAY, OR STONE
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2602469
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Patent number 2,602,469
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Issue date Jul 8, 1952
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B28 - WORKING CEMENT, CLAY, OR STONE
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2589950
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Patent number 2,589,950
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Issue date Mar 18, 1952
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B28 - WORKING CEMENT, CLAY, OR STONE
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2567666
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Patent number 2,567,666
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Issue date Sep 11, 1951
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B28 - WORKING CEMENT, CLAY, OR STONE
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2491890
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Patent number 2,491,890
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Issue date Dec 20, 1949
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B28 - WORKING CEMENT, CLAY, OR STONE
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2482949
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Patent number 2,482,949
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Issue date Sep 27, 1949
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B28 - WORKING CEMENT, CLAY, OR STONE
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2429012
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Patent number 2,429,012
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Issue date Oct 14, 1947
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B28 - WORKING CEMENT, CLAY, OR STONE
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2349213
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Patent number 2,349,213
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Issue date May 16, 1944
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B28 - WORKING CEMENT, CLAY, OR STONE
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2342801
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Patent number 2,342,801
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Issue date Feb 29, 1944
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B28 - WORKING CEMENT, CLAY, OR STONE