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3885133
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Patent number 3,885,133
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G06 - COMPUTING CALCULATING COUNTING
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3834614
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G06 - COMPUTING CALCULATING COUNTING
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3829663
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Patent number 3,829,663
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G06 - COMPUTING CALCULATING COUNTING
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2579019
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G06 - COMPUTING CALCULATING COUNTING
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2526730
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G06 - COMPUTING CALCULATING COUNTING
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2490240
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G06 - COMPUTING CALCULATING COUNTING
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2468812
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G06 - COMPUTING CALCULATING COUNTING
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2466883
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Patent number 2,466,883
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G06 - COMPUTING CALCULATING COUNTING
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2446696
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G06 - COMPUTING CALCULATING COUNTING
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2426601
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G06 - COMPUTING CALCULATING COUNTING
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2418910
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G06 - COMPUTING CALCULATING COUNTING
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2363642
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2328966
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2158476
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G06 - COMPUTING CALCULATING COUNTING
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2117413
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1911581
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1474533
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1423896
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1301140
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1014344
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920497
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838696
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746889
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G06 - COMPUTING CALCULATING COUNTING
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746888
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Patent number 746,888
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G06 - COMPUTING CALCULATING COUNTING