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Furniture antenna system
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Patent number 4,546,357
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Issue date Oct 8, 1985
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The Singer Company
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Thomas C. Laughon
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H01 - BASIC ELECTRIC ELEMENTS
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Double density display drive system
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Patent number 4,321,598
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Issue date Mar 23, 1982
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The Singer Company
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Richard C. Warner
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Ternary to binary converter
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Patent number 4,243,976
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Issue date Jan 6, 1981
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The Singer Company
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Richard C. Warner
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Binary to ternary converter
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Patent number 4,231,023
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Issue date Oct 28, 1980
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The Singer Company
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Richard C. Warner
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H04 - ELECTRIC COMMUNICATION TECHNIQUE