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3902160
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G06 - COMPUTING CALCULATING COUNTING
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G06 - COMPUTING CALCULATING COUNTING
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3795894
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Patent number 3,795,894
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G06 - COMPUTING CALCULATING COUNTING
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3790955
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Patent number 3,790,955
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3652991
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G06 - COMPUTING CALCULATING COUNTING
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3638238
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G06 - COMPUTING CALCULATING COUNTING
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3593285
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G06 - COMPUTING CALCULATING COUNTING
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3585587
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Patent number 3,585,587
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G06 - COMPUTING CALCULATING COUNTING
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3582885
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G06 - COMPUTING CALCULATING COUNTING
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3560927
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G06 - COMPUTING CALCULATING COUNTING
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3555508
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G06 - COMPUTING CALCULATING COUNTING
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3423730
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3281787
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G06 - COMPUTING CALCULATING COUNTING
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3271576
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3184711
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3167745
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G06 - COMPUTING CALCULATING COUNTING