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3404383
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Patent number 3,404,383
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Issue date Oct 1, 1968
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G11 - INFORMATION STORAGE
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3399396
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Patent number 3,399,396
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Issue date Aug 27, 1968
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G11 - INFORMATION STORAGE
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3230354
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Patent number 3,230,354
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Issue date Jan 18, 1966
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G06 - COMPUTING CALCULATING COUNTING
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3191159
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Patent number 3,191,159
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Issue date Jun 22, 1965
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G11 - INFORMATION STORAGE
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3191156
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Patent number 3,191,156
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Issue date Jun 22, 1965
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G06 - COMPUTING CALCULATING COUNTING
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3183491
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Patent number 3,183,491
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Issue date May 11, 1965
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G11 - INFORMATION STORAGE
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3179925
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Patent number 3,179,925
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Issue date Apr 20, 1965
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G11 - INFORMATION STORAGE
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3175197
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Patent number 3,175,197
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Issue date Mar 23, 1965
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G06 - COMPUTING CALCULATING COUNTING