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3912851
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Patent number 3,912,851
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Issue date Oct 14, 1975
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C03 - GLASS MINERAL OR SLAG WOOL
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3784807
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Patent number 3,784,807
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Issue date Jan 8, 1974
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H01 - BASIC ELECTRIC ELEMENTS
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3752554
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Patent number 3,752,554
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Issue date Aug 14, 1973
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C03 - GLASS MINERAL OR SLAG WOOL
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3725698
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Patent number 3,725,698
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Issue date Apr 3, 1973
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F21 - LIGHTING
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3632324
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Patent number 3,632,324
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Issue date Jan 4, 1972
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H01 - BASIC ELECTRIC ELEMENTS
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3525898
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Patent number 3,525,898
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Issue date Aug 25, 1970
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H01 - BASIC ELECTRIC ELEMENTS
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3517432
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Patent number 3,517,432
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Issue date Jun 30, 1970
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3451579
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Patent number 3,451,579
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Issue date Jun 24, 1969
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C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
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3351802
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Patent number 3,351,802
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Issue date Nov 7, 1967
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H01 - BASIC ELECTRIC ELEMENTS
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3275878
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Patent number 3,275,878
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Issue date Sep 27, 1966
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H01 - BASIC ELECTRIC ELEMENTS
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3051329
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Patent number 3,051,329
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Issue date Aug 28, 1962
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H01 - BASIC ELECTRIC ELEMENTS
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2754445
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Patent number 2,754,445
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Issue date Jul 10, 1956
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H01 - BASIC ELECTRIC ELEMENTS
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2701909
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Patent number 2,701,909
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Issue date Feb 15, 1955
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H01 - BASIC ELECTRIC ELEMENTS
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2584427
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Patent number 2,584,427
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Issue date Feb 5, 1952
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H01 - BASIC ELECTRIC ELEMENTS
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2569968
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Patent number 2,569,968
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Issue date Oct 2, 1951
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2301940
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Patent number 2,301,940
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Issue date Nov 17, 1942
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H01 - BASIC ELECTRIC ELEMENTS
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2268666
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Patent number 2,268,666
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Issue date Jan 6, 1942
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H01 - BASIC ELECTRIC ELEMENTS
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2248644
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Patent number 2,248,644
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Issue date Jul 8, 1941
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H01 - BASIC ELECTRIC ELEMENTS
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2212556
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Patent number 2,212,556
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Issue date Aug 27, 1940
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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2157722
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Patent number 2,157,722
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Issue date May 9, 1939
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H01 - BASIC ELECTRIC ELEMENTS
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2151885
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Patent number 2,151,885
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Issue date Mar 28, 1939
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H01 - BASIC ELECTRIC ELEMENTS
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2149133
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Patent number 2,149,133
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Issue date Feb 28, 1939
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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2137069
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Patent number 2,137,069
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Issue date Nov 15, 1938
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H01 - BASIC ELECTRIC ELEMENTS