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3923189
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Patent number 3,923,189
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Issue date Dec 2, 1975
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H01 - BASIC ELECTRIC ELEMENTS
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3746917
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Patent number 3,746,917
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Issue date Jul 17, 1973
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H01 - BASIC ELECTRIC ELEMENTS
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3722074
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Patent number 3,722,074
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Issue date Mar 27, 1973
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C03 - GLASS MINERAL OR SLAG WOOL
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3721948
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Patent number 3,721,948
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Issue date Mar 20, 1973
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H01 - BASIC ELECTRIC ELEMENTS
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3695860
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Patent number 3,695,860
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Issue date Oct 3, 1972
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H01 - BASIC ELECTRIC ELEMENTS
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3685005
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Patent number 3,685,005
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H01 - BASIC ELECTRIC ELEMENTS
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3631589
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Patent number 3,631,589
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Issue date Jan 4, 1972
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C03 - GLASS MINERAL OR SLAG WOOL
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3623855
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Patent number 3,623,855
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Issue date Nov 30, 1971
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H01 - BASIC ELECTRIC ELEMENTS
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3582300
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Patent number 3,582,300
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Issue date Jun 1, 1971
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C03 - GLASS MINERAL OR SLAG WOOL
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3543361
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Patent number 3,543,361
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Issue date Dec 1, 1970
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C03 - GLASS MINERAL OR SLAG WOOL
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3515530
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Patent number 3,515,530
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Issue date Jun 2, 1970
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C03 - GLASS MINERAL OR SLAG WOOL
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3412462
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Patent number 3,412,462
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Issue date Nov 26, 1968
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H01 - BASIC ELECTRIC ELEMENTS
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3368024
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Patent number 3,368,024
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Issue date Feb 6, 1968
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C03 - GLASS MINERAL OR SLAG WOOL
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3364002
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Patent number 3,364,002
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Issue date Jan 16, 1968
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C03 - GLASS MINERAL OR SLAG WOOL
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3311462
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Patent number 3,311,462
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H01 - BASIC ELECTRIC ELEMENTS
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3307253
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Patent number 3,307,253
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H01 - BASIC ELECTRIC ELEMENTS
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3282669
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Patent number 3,282,669
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Issue date Nov 1, 1966
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C03 - GLASS MINERAL OR SLAG WOOL
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3281174
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Patent number 3,281,174
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C03 - GLASS MINERAL OR SLAG WOOL
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3225132
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Patent number 3,225,132
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C03 - GLASS MINERAL OR SLAG WOOL
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3220815
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Patent number 3,220,815
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Issue date Nov 30, 1965
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3214254
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Patent number 3,214,254
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Issue date Oct 26, 1965
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C03 - GLASS MINERAL OR SLAG WOOL
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3203715
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Patent number 3,203,715
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C03 - GLASS MINERAL OR SLAG WOOL
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3193366
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H01 - BASIC ELECTRIC ELEMENTS
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3183361
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C03 - GLASS MINERAL OR SLAG WOOL
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3178275
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Patent number 3,178,275
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H01 - BASIC ELECTRIC ELEMENTS
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3171771
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Patent number 3,171,771
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C03 - GLASS MINERAL OR SLAG WOOL
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3094766
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H01 - BASIC ELECTRIC ELEMENTS
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3080738
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H01 - BASIC ELECTRIC ELEMENTS
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3069531
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H01 - BASIC ELECTRIC ELEMENTS
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3025978
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H01 - BASIC ELECTRIC ELEMENTS