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3717516
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H01 - BASIC ELECTRIC ELEMENTS
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H01 - BASIC ELECTRIC ELEMENTS
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3615942
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Patent number 3,615,942
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H01 - BASIC ELECTRIC ELEMENTS
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3595716
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H01 - BASIC ELECTRIC ELEMENTS
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3574009
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H01 - BASIC ELECTRIC ELEMENTS
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3491434
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H01 - BASIC ELECTRIC ELEMENTS
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3490964
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C30 - CRYSTAL GROWTH
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H01 - BASIC ELECTRIC ELEMENTS
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H01 - BASIC ELECTRIC ELEMENTS
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2802760
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