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Electronic timepiece
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Patent number 4,459,031
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Issue date Jul 10, 1984
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ETA A.G. Ebauches-Fabrik
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Norberto Perucchi
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G04 - HOROLOGY
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3925917
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Patent number 3,925,917
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Issue date Dec 16, 1975
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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3918252
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Patent number 3,918,252
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Issue date Nov 11, 1975
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G06 - COMPUTING CALCULATING COUNTING
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3908353
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Patent number 3,908,353
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Issue date Sep 30, 1975
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3723711
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Patent number 3,723,711
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Issue date Mar 27, 1973
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G06 - COMPUTING CALCULATING COUNTING
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3622762
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Patent number 3,622,762
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Issue date Nov 23, 1971
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G06 - COMPUTING CALCULATING COUNTING
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3440640
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Patent number 3,440,640
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Issue date Apr 22, 1969
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G06 - COMPUTING CALCULATING COUNTING