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3714503
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Patent number 3,714,503
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Issue date Jan 30, 1973
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3499107
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Patent number 3,499,107
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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3467882
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Patent number 3,467,882
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Issue date Sep 16, 1969
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H03 - BASIC ELECTRONIC CIRCUITRY
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3423620
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Patent number 3,423,620
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Issue date Jan 21, 1969
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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3423630
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Patent number 3,423,630
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Issue date Jan 21, 1969
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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3404310
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Patent number 3,404,310
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Issue date Oct 1, 1968
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H03 - BASIC ELECTRONIC CIRCUITRY
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3229150
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Patent number 3,229,150
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Issue date Jan 11, 1966
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H03 - BASIC ELECTRONIC CIRCUITRY
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3211946
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Patent number 3,211,946
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Issue date Oct 12, 1965
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H03 - BASIC ELECTRONIC CIRCUITRY
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3198978
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Patent number 3,198,978
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Issue date Aug 3, 1965
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3197671
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Patent number 3,197,671
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Issue date Jul 27, 1965
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H03 - BASIC ELECTRONIC CIRCUITRY
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3028508
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Patent number 3,028,508
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H03 - BASIC ELECTRONIC CIRCUITRY
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2995679
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2958003
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H03 - BASIC ELECTRONIC CIRCUITRY
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2896115
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H03 - BASIC ELECTRONIC CIRCUITRY
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2512400
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H03 - BASIC ELECTRONIC CIRCUITRY