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3553709
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H01 - BASIC ELECTRIC ELEMENTS
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3504371
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H01 - BASIC ELECTRIC ELEMENTS
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3460157
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Issue date Aug 5, 1969
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H01 - BASIC ELECTRIC ELEMENTS
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3453642
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H01 - BASIC ELECTRIC ELEMENTS
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3451637
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Patent number 3,451,637
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H01 - BASIC ELECTRIC ELEMENTS
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3449759
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Patent number 3,449,759
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H01 - BASIC ELECTRIC ELEMENTS
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3409906
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Issue date Nov 5, 1968
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G01 - MEASURING TESTING
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3384900
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Patent number 3,384,900
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G11 - INFORMATION STORAGE
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3345639
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3222678
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G11 - INFORMATION STORAGE
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3131020
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H01 - BASIC ELECTRIC ELEMENTS
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2185373
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H01 - BASIC ELECTRIC ELEMENTS
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2169726
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H01 - BASIC ELECTRIC ELEMENTS
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2091826
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H01 - BASIC ELECTRIC ELEMENTS
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1943109
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H01 - BASIC ELECTRIC ELEMENTS
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H01 - BASIC ELECTRIC ELEMENTS