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2997233
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Patent number 2,997,233
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G06 - COMPUTING CALCULATING COUNTING
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2988701
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G11 - INFORMATION STORAGE
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2975365
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Patent number 2,975,365
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G11 - INFORMATION STORAGE
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2935259
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Patent number 2,935,259
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G06 - COMPUTING CALCULATING COUNTING
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2922985
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G11 - INFORMATION STORAGE
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2906870
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Patent number 2,906,870
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G11 - INFORMATION STORAGE
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2901603
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Patent number 2,901,603
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G11 - INFORMATION STORAGE
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2900500
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G11 - INFORMATION STORAGE
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2879334
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G11 - INFORMATION STORAGE
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2873855
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G11 - INFORMATION STORAGE
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2819840
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G11 - INFORMATION STORAGE
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2808203
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G11 - INFORMATION STORAGE
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2802104
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G11 - INFORMATION STORAGE
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2801334
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G11 - INFORMATION STORAGE
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2790076
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G11 - INFORMATION STORAGE
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2785304
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G11 - INFORMATION STORAGE
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2782305
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G11 - INFORMATION STORAGE
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2781447
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G06 - COMPUTING CALCULATING COUNTING
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2764343
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G11 - INFORMATION STORAGE
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2749440
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G06 - COMPUTING CALCULATING COUNTING
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2723080
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G11 - INFORMATION STORAGE
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2700502
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G11 - INFORMATION STORAGE
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2666575
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G11 - INFORMATION STORAGE
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2638542
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G11 - INFORMATION STORAGE
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2636672
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G06 - COMPUTING CALCULATING COUNTING
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2628309
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G11 - INFORMATION STORAGE
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2601089
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G11 - INFORMATION STORAGE
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2585630
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G06 - COMPUTING CALCULATING COUNTING
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2580771
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G11 - INFORMATION STORAGE