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3894223
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Patent number 3,894,223
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Issue date Jul 8, 1975
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G06 - COMPUTING CALCULATING COUNTING
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3866191
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Patent number 3,866,191
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Issue date Feb 11, 1975
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H03 - BASIC ELECTRONIC CIRCUITRY
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3713118
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Patent number 3,713,118
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Issue date Jan 23, 1973
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G11 - INFORMATION STORAGE
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3706081
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Patent number 3,706,081
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Issue date Dec 12, 1972
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G11 - INFORMATION STORAGE
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3706082
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Patent number 3,706,082
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Issue date Dec 12, 1972
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G11 - INFORMATION STORAGE
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3633185
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Patent number 3,633,185
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Issue date Jan 4, 1972
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G11 - INFORMATION STORAGE