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H01 - BASIC ELECTRIC ELEMENTS
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3474364
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H01 - BASIC ELECTRIC ELEMENTS
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3292120
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Patent number 3,292,120
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3102934
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2997546
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2903520
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2863020
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2863018
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Patent number 2,863,018
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2824924
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2800552
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H01 - BASIC ELECTRIC ELEMENTS
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2283366
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1958640
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1699782
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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1568748
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H01 - BASIC ELECTRIC ELEMENTS