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3859127
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Patent number 3,859,127
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Issue date Jan 7, 1975
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H01 - BASIC ELECTRIC ELEMENTS
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3814997
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Patent number 3,814,997
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Issue date Jun 4, 1974
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H01 - BASIC ELECTRIC ELEMENTS
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3806361
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Patent number 3,806,361
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Issue date Apr 23, 1974
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H01 - BASIC ELECTRIC ELEMENTS
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3472689
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Patent number 3,472,689
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Issue date Oct 14, 1969
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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2841510
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Patent number 2,841,510
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Issue date Jul 1, 1958
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H01 - BASIC ELECTRIC ELEMENTS
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2789258
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Patent number 2,789,258
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Issue date Apr 16, 1957
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H01 - BASIC ELECTRIC ELEMENTS