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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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3884007
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Patent number 3,884,007
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Issue date May 20, 1975
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G02 - OPTICS
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3870393
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Patent number 3,870,393
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Issue date Mar 11, 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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3716744
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Patent number 3,716,744
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Issue date Feb 13, 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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Issue date Aug 15, 1972
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H01 - BASIC ELECTRIC ELEMENTS
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3674586
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Patent number 3,674,586
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Issue date Jul 4, 1972
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3646405
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Patent number 3,646,405
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Issue date Feb 29, 1972
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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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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3513535
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Patent number 3,513,535
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Issue date May 26, 1970
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H01 - BASIC ELECTRIC ELEMENTS
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3502837
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Patent number 3,502,837
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Issue date Mar 24, 1970
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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3481638
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Patent number 3,481,638
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Issue date Dec 2, 1969
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES