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Dual function decimal key
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Patent number 4,680,725
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Issue date Jul 14, 1987
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The Laitram Corporation
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James M. Lapeyre
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G06 - COMPUTING CALCULATING COUNTING
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3828174
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Patent number 3,828,174
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Issue date Aug 6, 1974
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G06 - COMPUTING CALCULATING COUNTING
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3778778
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Patent number 3,778,778
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Issue date Dec 11, 1973
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G06 - COMPUTING CALCULATING COUNTING
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3691358
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Patent number 3,691,358
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Issue date Sep 12, 1972
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G06 - COMPUTING CALCULATING COUNTING
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3685041
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Patent number 3,685,041
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Issue date Aug 15, 1972
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G06 - COMPUTING CALCULATING COUNTING
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3657529
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Patent number 3,657,529
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Issue date Apr 18, 1972
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G06 - COMPUTING CALCULATING COUNTING
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3634666
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Patent number 3,634,666
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Issue date Jan 11, 1972
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G06 - COMPUTING CALCULATING COUNTING
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3622768
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Patent number 3,622,768
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Issue date Nov 23, 1971
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G06 - COMPUTING CALCULATING COUNTING