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Multi-cavity dielectric filter
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Patent number 5,373,270
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Issue date Dec 13, 1994
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Radio Frequency Systems, Inc.
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William D. Blair
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H01 - BASIC ELECTRIC ELEMENTS
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Duplexing filter
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Patent number 5,151,670
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Issue date Sep 29, 1992
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Radio Frequency Systems, Inc.
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William D. Blair
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H01 - BASIC ELECTRIC ELEMENTS
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Dielectric notch resonator
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Patent number 4,896,125
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Issue date Jan 23, 1990
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Alcatel NA, Inc.
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William D. Blair
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H01 - BASIC ELECTRIC ELEMENTS
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Dielectric notch filter
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Patent number 4,862,122
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Issue date Aug 29, 1989
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Alcatel NA, Inc.
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William D. Blair
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H01 - BASIC ELECTRIC ELEMENTS