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3906169
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G11 - INFORMATION STORAGE
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3440361
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Patent number 3,440,361
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G11 - INFORMATION STORAGE
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3430005
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Patent number 3,430,005
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G11 - INFORMATION STORAGE
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Patent number 3,420,967
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G11 - INFORMATION STORAGE
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3275326
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G11 - INFORMATION STORAGE
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3246085
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G11 - INFORMATION STORAGE
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G11 - INFORMATION STORAGE
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Patent number 3,169,773
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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G11 - INFORMATION STORAGE
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G11 - INFORMATION STORAGE
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G11 - INFORMATION STORAGE
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G11 - INFORMATION STORAGE
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G11 - INFORMATION STORAGE
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G11 - INFORMATION STORAGE