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Patent number 5,339,358
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Issue date Aug 16, 1994
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Danish International, Inc.
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Adel Danish
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G06 - COMPUTING CALCULATING COUNTING
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Synthetic-speech calculators
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Patent number 4,282,404
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Issue date Aug 4, 1981
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Sharp Kabushiki Kaisha
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Akira Tanimoto
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G06 - COMPUTING CALCULATING COUNTING
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Synthetic-speech calculators
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Patent number 4,185,169
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Issue date Jan 22, 1980
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Sharp Kabushiki Kaisha
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Akira Tanimoto
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G06 - COMPUTING CALCULATING COUNTING
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Remote data line monitor
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Patent number 3,992,587
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Issue date Nov 16, 1976
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National Data Corporation
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Dennis E. Puckett
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3675513
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Patent number 3,675,513
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Issue date Jul 11, 1972
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H04 - ELECTRIC COMMUNICATION TECHNIQUE