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3892835
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Patent number 3,892,835
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Issue date Jul 1, 1975
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B28 - WORKING CEMENT, CLAY, OR STONE
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3857157
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Patent number 3,857,157
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Issue date Dec 31, 1974
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B22 - CASTING POWDER METALLURGY
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3843541
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Patent number 3,843,541
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Issue date Oct 22, 1974
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3811899
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Patent number 3,811,899
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Issue date May 21, 1974
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3732056
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Patent number 3,732,056
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Issue date May 8, 1973
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B28 - WORKING CEMENT, CLAY, OR STONE
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3717694
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Patent number 3,717,694
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Issue date Feb 20, 1973
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3713193
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Patent number 3,713,193
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Issue date Jan 30, 1973
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B28 - WORKING CEMENT, CLAY, OR STONE
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3703278
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Patent number 3,703,278
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Issue date Nov 21, 1972
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B22 - CASTING POWDER METALLURGY
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3695597
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Patent number 3,695,597
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Issue date Oct 3, 1972
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B22 - CASTING POWDER METALLURGY
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3656946
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Patent number 3,656,946
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Issue date Apr 18, 1972
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B28 - WORKING CEMENT, CLAY, OR STONE
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3571849
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Patent number 3,571,849
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Issue date Mar 23, 1971
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3562371
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Patent number 3,562,371
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Issue date Feb 9, 1971
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B22 - CASTING POWDER METALLURGY
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3559242
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Patent number 3,559,242
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Issue date Feb 2, 1971
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3557414
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Patent number 3,557,414
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Issue date Jan 26, 1971
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B28 - WORKING CEMENT, CLAY, OR STONE
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3557266
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Patent number 3,557,266
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Issue date Jan 19, 1971
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3553800
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Patent number 3,553,800
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Issue date Jan 12, 1971
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B22 - CASTING POWDER METALLURGY
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3536506
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Patent number 3,536,506
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Issue date Oct 27, 1970
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3505438
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Patent number 3,505,438
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Issue date Apr 7, 1970
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3467745
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Patent number 3,467,745
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Issue date Sep 16, 1969
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3465074
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Patent number 3,465,074
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Issue date Sep 2, 1969
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3459503
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Patent number 3,459,503
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Issue date Aug 5, 1969
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES