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Superconducting reflection filter
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Patent number 5,155,634
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Issue date Oct 13, 1992
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The United States of America as represented by the Secretary of the Air Force
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Robert J. Spry
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G02 - OPTICS
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3533018
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Patent number 3,533,018
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Issue date Oct 6, 1970
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H03 - BASIC ELECTRONIC CIRCUITRY
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2914736
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Patent number 2,914,736
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Issue date Nov 24, 1959
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G11 - INFORMATION STORAGE
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2659868
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Patent number 2,659,868
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Issue date Nov 17, 1953
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H03 - BASIC ELECTRONIC CIRCUITRY
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2533908
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Patent number 2,533,908
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Issue date Dec 12, 1950
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H03 - BASIC ELECTRONIC CIRCUITRY