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Radio frequency combiner
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Patent number 4,785,267
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Issue date Nov 15, 1988
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Nautical Electronic Laboratories Limited
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Dennis H. Covill
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H01 - BASIC ELECTRIC ELEMENTS
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AM pulse duration modulator
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Patent number 4,605,910
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Issue date Aug 12, 1986
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Nautical Electronic Laboratories Limited
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Dennis H. Covill
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H03 - BASIC ELECTRONIC CIRCUITRY
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Driver circuit
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Patent number 4,535,298
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Issue date Aug 13, 1985
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Nautical Electronics Laboratories Limited
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Dennis H. Covill
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H03 - BASIC ELECTRONIC CIRCUITRY
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Combiner system
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Patent number 4,156,212
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Issue date May 22, 1979
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Nautical Electronic Laboratories, Ltd.
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Dennis H. Covill
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H04 - ELECTRIC COMMUNICATION TECHNIQUE