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3646528
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Issue date Feb 29, 1972
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G11 - INFORMATION STORAGE
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3611324
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Patent number 3,611,324
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G11 - INFORMATION STORAGE
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3483532
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Patent number 3,483,532
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G11 - INFORMATION STORAGE
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3460102
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Patent number 3,460,102
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G11 - INFORMATION STORAGE
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3418642
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Patent number 3,418,642
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G11 - INFORMATION STORAGE
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3321746
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Patent number 3,321,746
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G11 - INFORMATION STORAGE
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3320592
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Patent number 3,320,592
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G11 - INFORMATION STORAGE
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3312956
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Patent number 3,312,956
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G11 - INFORMATION STORAGE
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3296599
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Patent number 3,296,599
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G11 - INFORMATION STORAGE
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3243785
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G11 - INFORMATION STORAGE
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Issue date Mar 29, 1966
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G11 - INFORMATION STORAGE
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3235839
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G11 - INFORMATION STORAGE
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G11 - INFORMATION STORAGE
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3196407
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G11 - INFORMATION STORAGE
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3196410
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G11 - INFORMATION STORAGE
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3196409
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Patent number 3,196,409
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G11 - INFORMATION STORAGE
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3191155
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G11 - INFORMATION STORAGE