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3255340
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G06 - COMPUTING CALCULATING COUNTING
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G06 - COMPUTING CALCULATING COUNTING
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2935258
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G06 - COMPUTING CALCULATING COUNTING
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2750111
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G06 - COMPUTING CALCULATING COUNTING
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2750112
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Patent number 2,750,112
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G06 - COMPUTING CALCULATING COUNTING
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2660373
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G06 - COMPUTING CALCULATING COUNTING
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2622801
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G06 - COMPUTING CALCULATING COUNTING
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2620976
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G06 - COMPUTING CALCULATING COUNTING
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2602588
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G06 - COMPUTING CALCULATING COUNTING
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2536906
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G06 - COMPUTING CALCULATING COUNTING
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2477722
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G06 - COMPUTING CALCULATING COUNTING
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2338206
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G06 - COMPUTING CALCULATING COUNTING
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2239892
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G06 - COMPUTING CALCULATING COUNTING
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2168763
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G06 - COMPUTING CALCULATING COUNTING
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2126615
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G06 - COMPUTING CALCULATING COUNTING
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2120232
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G06 - COMPUTING CALCULATING COUNTING
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2120233
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G06 - COMPUTING CALCULATING COUNTING
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2070824
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G06 - COMPUTING CALCULATING COUNTING
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1487703
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1487704
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G06 - COMPUTING CALCULATING COUNTING