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PULSE MULTIPLYING CIRCUIT

Year of Publication 29.03.1980
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Patent
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DIGITAL MULTIPLYING CIRCUIT

Year of Publication 14.02.1973
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Patent
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AUTOMATIC FOCUSING DEVICE

by ITO YUJIRO
Year of Publication 11.09.1998
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Patent
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Accounting machine

by BRYCE JAMES W
Year of Publication 23.06.1936
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Patent
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FR767435

Year of Publication 16.07.1934
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Patent
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